set 3 MCQ Questions & Answers Detailed Explanation

Question : 1

What is the correct equation for finding the acceleration?

a) a = ${v + u}/t$

b) a = u + vt

c) a = ${v - u}/t$

d) a = ${v + u}/2$

Question : 2

A large truck and a car, both moving with a velocity of magnitude v, have a head-on collision. If the collision lasts for 1 s, which vehicle experiences a greater change in momentum?

a) Both have the different changes in momentum

b) Both have the same change in momentum

c) Car has more change in momentum than truck

d) Truck have more change in momentum than Car

Question : 3

When a body is stationary

a) the combination of forces acting on it balances each other

b) the force acting on it not in contact with it

c) there is no force acting on it

d) the body is in vacuum

Question : 4

A missile is launched with a velocity less than escape velocity. The sum of its kinetic and potential energies is

a) positive

b) negative

c) zero

d) may be positive, negative or zero

Question : 5

Which physical quantity is represented by the ratio of momentum and velocity of the body?

a) Mass

b) Acceleration

c) Velocity

d) Force

Question : 6

The energy of wind is

a) Electrical

b) Only kinetic

c) Only potential

d) Potential and kinetic both