Question

Que. 1) Read the following and answer the questions.
Two friends of class IX where sitting in a restaurant and try to push a pillar with all their might.

The first one explains the situation that the pillar did not move because of its inertia while the

second one says that it is because action and reaction forces cancel each others effect.

i) Which of the two friends give correct justification?

a) First friend b) Second friend c) Both of them d) None of them

ii) Two balls A and B of masses m and 2m are in motion with velocities 2V and V,

respectively. Then

a) A has inertia than B b) B has greater inertia than A

c) Both A and B have same inertia d) None of these

iii) The velocity time graph of a ball moving on the surface of floor is shown in the figure.

If the mass of the ball is 100g the force acting on the ball is

a) 0.2 N b) 0.5 N c) 0.8 N d) 1 N

iv) A horse continues to apply a force in order to move a cart with a constant speed.

a) to overcome the force of friction between ground and card.

b) to maintain a balanced force between card and ground.

c) to maintain unbalanced force between card and ground.

d) none of the above

v) A bullet of mass 10g strikes a sand buy at a speed of 103 ms-1 and gets embedded after

travelling 5 cm. The resistive force exerted by the sand on the bullet is

a) -10s N b) -108 N c) +105 N d) +108 N​

Answer 1

Answer:

both a and b

Explanation: