Question

A change in velocity of a body may be produced either by a change in its magnitude (which is the change in its speed) or a change in its direction. Whenever there is a change in the velocity of a body, its motion is said to be accelerated. Acceleration of a body is defined as the rate of change of its velocity with time. If a body moving in a straight line increases (or decreases) its velocity by equal amounts in equal intervals of time, it is said to possess a uniform acceleration. In the case, where a body moves in a circular path with a uniform speed, its velocity changes continuously due to a change in its direction. Such a motion is said to be accelerated but due to its constant speed it is called uniform circular motion. A body possesses a non-uniform acceleration if its velocity increases by unequal amounts in equal intervals of time. Q1. Consider the following statements: Statement A: The average speed is the ratio of the total distance travelled to the total time taken to cover this distance. Statement B: The speedometer of a car registers the average speed of the car. A) Which of the following is correct with respect to the above statements? a) Statements A and B are both true. B) A force of a given magnitude acts on a body. The acceleration of the body depends on the a) mass of the body. (b) direction of the force. (c) volume of the body. (d) area on which the force acts. Q2. Consider the following statements: Statement A: When a body is at rest, its acceleration is zero. Statement B: When a body is at rest, no force acts on it. Which of the following is correct with respect to the above statements? a) Statements A and B are both true and statement B is a correct explanation of Statement A. b) Statements A and B are both true but statement B is not a correct explanation of Statement A. c) Statement A is true but Statement B is false. d) Statement A is false but Statement B is true.

Answer 1

A) a
B) b
C) c
These are the answers...

Answer 2

Answer:

ans A,B,C . . ..........