Yes. For example, the cross product of two non-zero vectors will be zero when angle Θ=0°or 180
-Answered by Shruti Srivastva On 11 July 2020:01:01:30 PM
Question 1. Asked on :11 July 2020:12:59:31 PM
Can two non-zero vectors give zero resultant when they multiplying with each other?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
Yes. For example, the cross product of two non-zero vectors will be zero when angle Θ=0°or 180
-Answered by Shruti Srivastva On 11 July 2020:01:01:30 PM
Question 2. Asked on :11 July 2020:12:57:10 PM
What furnishes the centripetal acceleration for the earth to go round the sun?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
The gravitational pull of the sun on the earth.
-Answered by Shruti Srivastva On 11 July 2020:12:58:58 PM
Question 3. Asked on :11 July 2020:12:55:37 PM
Define cross product of two vectors A and B?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
-Answered by Anjali Kumari On 15 October 2020:07:24:04 PM
Question 4. Asked on :11 July 2020:12:55:06 PM
Define null vector?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
-Answered by Dr. MS Khan On 18 July 2020:02:52:49 PM
Question 5. Asked on :11 July 2020:12:53:39 PM
Define unit vector?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
-Answered by Anjali Kumari On 15 October 2020:07:25:12 PM
Question 6. Asked on :11 July 2020:12:34:04 PM
Name two quantities which have maximum value when the maximum height attained by the projectile in the largest?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
(i) vertical component of initial velocity.
(ii) Time of flight.
-Answered by Shruti Srivastva On 11 July 2020:12:36:30 PM
Question 7. Asked on :11 July 2020:12:31:25 PM
A particle moves in a plane with uniform acceleration in a direction different from its initial velocity. What will be the trajectory followed by the particles?
-Added by Shruti Srivastva Chemistry » Motion In A Plane
Answer:
Parabolic path.
-Answered by Shruti Srivastva On 11 July 2020:12:33:50 PM
Question 8. Asked on :11 July 2020:12:18:12 PM
Whe does the direction of of motion of a projectile become horizontal at the highest point of its treajectory?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
At the highest point; the vertical component of projectile velocity becomes zero. The projectile has only the horizontal component of velocity.
-Answered by Shruti Srivastva On 11 July 2020:12:20:51 PM
Question 9. Asked on :10 July 2020:06:10:44 PM
Is it true that the instantaneous velocity of a projectile is thagential to its parabolic path?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
Yes it is true.
-Answered by Shruti Srivastva On 10 July 2020:06:13:13 PM
Question 10. Asked on :10 July 2020:06:08:33 PM
A football is thrown in a parbolic path. Is there any point at which the acceleration is perpendicular to the velocity?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
Yes, at the highest point of the parabolic path.
-Answered by Shruti Srivastva On 10 July 2020:06:10:07 PM
Question 11. Asked on :10 July 2020:06:05:46 PM
Name the quantity which remains unchanged during the flight of an oblique projectile.
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
Horizontal component of velocity.
-Answered by Shruti Srivastva On 10 July 2020:06:07:34 PM
Question 12. Asked on :10 July 2020:06:00:48 PM
Can a body possess velocity st the same time in horizontal and vertical?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
Horizontal component of velocity.
-Answered by Shruti Srivastva On 10 July 2020:06:05:21 PM
Question 13. Asked on :10 July 2020:05:58:17 PM
Velocity of a projectile is 10ms-1 . At what angle to the horizontally should it be projected so that it covers maximum horizontal distance?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
Yes, a body in projectile motion possesses both horizontal and vertical velocities.
-Answered by Shruti Srivastva On 10 July 2020:06:04:07 PM
Question 14. Asked on :10 July 2020:05:56:28 PM
What are horizontal and vertical components of acceleration of a body thrown horizontally with uniform speed?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
For a body thrown horizontally with a uniform speed,
acceleration along horizontal=0
acceleration along vertical=g
-Answered by Shruti Srivastva On 10 July 2020:06:02:12 PM
Question 15. Asked on :10 July 2020:05:53:14 PM
When vectors are added or subtracted, their resultant is a vector. Is it also true in case of multiplication of two vectors?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
May or may not be. The dot product of two vectors gives a scalar quantity while the cross product gives a vector quantity.
-Answered by Shruti Srivastva On 10 July 2020:05:54:55 PM
Question 16. Asked on :10 July 2020:05:49:51 PM
Two vectors of magnitude 5 and 3 give a resultant of magnitude 2. What must be the angle between the two vector?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
As 5-3=2 this indicates that the two vectors have opposite directions and angle between them = 180º
-Answered by Shruti Srivastva On 10 July 2020:05:51:38 PM
Question 17. Asked on :10 July 2020:05:46:38 PM
Two vectors of magnitude 3 and 4 give a resultant of magnitude 2. What must be the dot product of these two vectors?
-Added by Shruti Srivastva Physics » Motion In A Plane
Question 18. Asked on :10 July 2020:05:42:13 PM
Can the magnitude of the resultant vector of two given vectors be less than the magnitude of either vector?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
Yes,zΘº
-Answered by Shruti Srivastva On 10 July 2020:05:43:47 PM
Question 19. Asked on :10 July 2020:05:38:35 PM
Give one example of dot products of vectors.
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
Work done is equal to the dot product of force and displacement vectors.
-Answered by Shruti Srivastva On 10 July 2020:05:39:49 PM
Question 20. Asked on :10 July 2020:05:35:59 PM
Under what condition is the scalar product of two non-zero vectors zero?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
When they are mutually perpendicular to each other.
-Answered by Shruti Srivastva On 10 July 2020:05:41:11 PM
Question 21. Asked on :10 July 2020:02:16:56 PM
Fifteen vectors, each of magnitude 5 units, are represented by the sides of a closed polygon, all taken in same order. What will be their resultant?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
Zero vector. The vector sum of all the vectors represented by the sides of a closed polygon taken in the same order is zero.
-Answered by Shruti Srivastva On 10 July 2020:02:19:27 PM
Question 22. Asked on :10 July 2020:02:14:42 PM
Can any of the components of a given vector have greater magnitude than that of the vector itself?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
Yes, provided the components are not rectangular.
-Answered by Shruti Srivastva On 10 July 2020:02:16:10 PM
Question 23. Asked on :10 July 2020:02:12:58 PM
Can the sum of two vectors be a scalar?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
No, the sum of two vectors is always a vector.
-Answered by Shruti Srivastva On 10 July 2020:02:13:56 PM
Question 24. Asked on :10 July 2020:02:11:35 PM
Is the division of vector defined?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
No, the division of vector cannot be defined
-Answered by Shruti Srivastva On 10 July 2020:02:12:16 PM
Question 25. Asked on :10 July 2020:02:09:42 PM
Give an example of a zero vector.
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
The displacement of a ball thrown up and received and back by the thrower is a zero vector.
-Answered by Shruti Srivastva On 10 July 2020:02:10:24 PM
Question 26. Asked on :10 July 2020:02:07:11 PM
Does it make a sense to call a physical quantity a vector, when its magnitude is zero?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
Yes. A zero vector has a definite physical significance.
-Answered by Shruti Srivastva On 10 July 2020:02:08:37 PM
Question 27. Asked on :10 July 2020:02:04:30 PM
What is the minimum number of forces of equal magnitude whose vector sum is zero?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
Two force provided the forces have opposite direction.
-Answered by Shruti Srivastva On 10 July 2020:02:06:26 PM
Question 28. Asked on :10 July 2020:01:56:38 PM
Can three vectors of different magnitudes be combined to give a zero resultant?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
Yes, when three vectors are represented by the three sides of a triangle taken in order, they will have resultant null-vector.
-Answered by Shruti Srivastva On 10 July 2020:01:58:11 PM
Question 29. Asked on :10 July 2020:01:54:02 PM
The resultant of two or more vectors is that single vector which produces the same effect as the individual vectors together produce?
-Added by Shruti Srivastva Physics » Motion In A Plane
Question 30. Asked on :10 July 2020:01:52:04 PM
Under what condition the sum and difference of two vectors will be equal in magnitude?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
When the two vectors are perpendicular to each other.
-Answered by Shruti Srivastva On 10 July 2020:01:53:23 PM
Question 31. Asked on :10 July 2020:01:49:38 PM
When can the addition of two vectors be zero?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
The addition of two vectors can be zero only when these vectors have equal magnitude and opposite direction.
-Answered by Shruti Srivastva On 10 July 2020:01:50:47 PM
Question 32. Asked on :10 July 2020:01:47:49 PM
When is the sum of two vectors are minimum?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
When two vectors have opposite directions, their sum is minimum.
-Answered by Shruti Srivastva On 10 July 2020:01:48:47 PM
Question 33. Asked on :10 July 2020:01:46:05 PM
When sum of two vectors are maximum?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
When two vectors have same direction, their sum is maximum.
-Answered by Shruti Srivastva On 10 July 2020:01:47:05 PM
Question 34. Asked on :10 July 2020:01:43:32 PM
A given quantity has both magnitude and direction. Is it necessarily a vector?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
No. The given quantity will be a vector only if it obeys the law of vector addition.
-Answered by Shruti Srivastva On 10 July 2020:01:44:53 PM
Question 35. Asked on :10 July 2020:01:40:22 PM
Does a scalar quantity depend on the frame of reference chosen?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
No. A scalar quantity does not depend on the frame of reference.
-Answered by Shruti Srivastva On 10 July 2020:01:42:18 PM
Question 36. Asked on :10 July 2020:01:36:31 PM
What is the minimum number of coplanar vectors of different magnitude which can give zero resultant ?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
Three. If three vectors can be represented by the three sides of a triangle taken in the same order, then their resultant is a zero vector.
-Answered by Shruti Srivastva On 10 July 2020:01:38:38 PM
Question 37. Asked on :10 July 2020:01:34:13 PM
Can we add a velocity vector to a displacement vector?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
No, only vectors representing physical quantities of same nature can be added together.
-Answered by Shruti Srivastva On 10 July 2020:01:35:20 PM
Question 38. Asked on :10 July 2020:01:30:49 PM
Under what condition will the direction of sum and diffrence of two vector be same?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
When the two vectors are unequal in magnitude and are in the same direction.
-Answered by Shruti Srivastva On 10 July 2020:01:33:02 PM
Question 39. Asked on :10 July 2020:01:28:38 PM
Can two vector of different magnitudes be combined to give resultant?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
No.
-Answered by Shruti Srivastva On 10 July 2020:01:30:12 PM
Question 40. Asked on :10 July 2020:01:27:36 PM
Is pressure a vector quantity?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
No
-Answered by Shruti Srivastva On 10 July 2020:01:28:24 PM
Question 41. Asked on :10 July 2020:01:26:27 PM
Is time a vector quantity?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
No.
-Answered by Shruti Srivastva On 10 July 2020:01:27:10 PM
Question 42. Asked on :10 July 2020:01:23:55 PM
State the essential condition for the addition of vectors?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
The essential condition for the addition of vectors is that they must represent the physical quantity of some nature.
-Answered by Shruti Srivastva On 10 July 2020:01:24:56 PM
Question 43. Asked on :10 July 2020:01:20:12 PM
Why cannot be vectors added algebraicall?
-Added by Shruti Srivastva Physics » Motion In A Plane
Answer:
A part from magnitude, the vectors also have direction, so they cannotnbe added algebrically.
-Answered by Shruti Srivastva On 10 July 2020:01:22:43 PM
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