Question 1. Asked on :30 September 2021:07:56:14 PM
Why it is easier to work with pulley than a fixed pulley?
-Added by Deborah KC Physics » Simple Machine
Answer by: Master Mind
The fixed pulley need more force than a normal pulley as when we apply a force on a rope of a pulley it experiences greater force on the object that we apply. Therefore it is easier to work with pulley.
-Answered by Master Mind On 17 December 2021:07:43:34 AM
Question 2. Asked on :25 November 2020:01:26:40 PM
Why do we dissolve oleic acid in alcohal?
-Added by Himanshi Verma Physics » Motion In A Straight Line.
Answer by: Himanshi Verma
Oleic acid is soluble in alcohal and diluting it with alcohal will replace it's concentration consequently it will helps to form a very thin (almost the molecular thickness) get formed and we can measure it's thickness by calculating volume.
-Answered by Himanshi Verma On 25 November 2020:01:28:10 PM
Question 3. Asked on :25 November 2020:01:22:49 PM
What is accuracy and precision?
-Added by Himanshi Verma Physics » Motion In A Straight Line.
Answer by: Himanshi Verma
Accuracy :- Accuracy is how close a measured value is to the actual value.
Precision:- Precision is how closed the measured value are to each other.
-Answered by Himanshi Verma On 25 November 2020:01:24:02 PM
Question 4. Asked on :25 November 2020:01:21:18 PM
Name two phyiscal quantities that have units but no dimensional formula?
-Added by Himanshi Verma Physics » Motion In A Straight Line.
Answer by: Shruti Srivastva
-Answered by Shruti Srivastva On 13 April 2021:01:00:48 PM
Answer by: Himanshi Verma
Plane Angle, Angular displacement have units but no dimensional formula.
-Answered by Himanshi Verma On 25 November 2020:01:22:11 PM
Question 5. Asked on :25 November 2020:01:18:43 PM
Define negative acceleration?
-Added by Himanshi Verma Physics » Motion In A Straight Line.
Answer by: Himanshi Verma
If the velocity of a body is decreasing with time then it is said to travel with a negative acceleration. {Retardation, declaration}.
-Answered by Himanshi Verma On 25 November 2020:01:19:28 PM
Question 6. Asked on :25 November 2020:01:15:34 PM
A ball is thrown vertically upwards. What is it's velocity at the highest point?
-Added by Himanshi Verma Physics » Motion In A Straight Line.
Answer by: Himanshi Verma
It continuous upwards unit it reaches a certain position, and then it falls downwards, At that highest point, it's velocity is instantaneously zero.
-Answered by Himanshi Verma On 25 November 2020:01:16:54 PM
Question 7. Asked on :25 November 2020:01:13:41 PM
What is Unit vector?
-Added by Himanshi Verma Physics » Motion In A Plane
Answer by: Himanshi Verma
A unit vector is a vector that has a magnitude of 1 unit. A unit vector is also known as direction vector.
-Answered by Himanshi Verma On 25 November 2020:01:14:31 PM
Question 8. Asked on :25 November 2020:01:09:39 PM
State the Triangular law of vector addition.
-Added by Himanshi Verma Physics » Motion In A Straight Line
Answer by: Himanshi Verma
It states that if two vectors acting on a particle at the same time are represented in magnitude and direction by the two sides of a triangle in one order, their resultant vector is represented in magnitude and direction by the third side of the triangle taken in opposite order.
-Answered by Himanshi Verma On 25 November 2020:01:11:05 PM
Question 9. Asked on :25 November 2020:01:04:53 PM
What is instantaneous speed and velocity?
-Added by Himanshi Verma Physics » Motion In A Straight Line
Answer by: Himanshi Verma
Instantaneous speed = The speed of a body at a particular instant of time during the motion is called instantaneous speed.
Instantaneous velocity = The velocity of a body at any instant of time is known as instantaneous velocity.
-Answered by Himanshi Verma On 25 November 2020:01:05:35 PM
Question 10. Asked on :25 November 2020:01:02:09 PM
Define Average speed
-Added by Himanshi Verma Physics » Motion In A Straight Line
Answer by: Himanshi Verma
The average distance covered by a body per unit time is known as average speed. It is calculated as the ratio of the total distance travelled to the total time taken.
-Answered by Himanshi Verma On 25 November 2020:01:03:26 PM
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