a. Because the bullet is made of a special metal.

b. Because the particles of glass near the hole, cannot share the very quick motion of the bullet and remain undisturbed.

c. Because of both of these.

d. Because of none of these.

a. time.

b. distance.

c. velocity.

d. intensity of light.

a. He should row straight towards that point.

b. He should row in a direction inclined to the bank up-stream.

c. In whatever way he may row, he cannot reach that point.

d. None of these.

a. Because, when a person bends forward, the line passing through the c6tre of gravity of the person does not lie within his feet. Therefore, the equilibrium is stable and the person can climb easily.

b. Because, when a person leans f6rward, the line passing through the centre of gravity of the person lies within his feet. Therefore, the equilibrium is stable and the person can climb easily.

c. Because, when a person leans forward, the force of friction between his feet and the ground is reduced. Therefore, the chances of slipping are considerably reduced.

d. None of these.

a. Because it provides him the centripetal force necessary to keep him stable.

b. Because he wants to have a better view of the traffic ahead.

c. Both of these.

d. None of these.

a. Change in the state of rest of a body.

b. Change in the state of motion of a body.

c. Both of these.

d. None of these.

a. Because sand is cooler than the hard ground.

b. Because sand is hotter than the hard ground.

c. Because the jumper can penetrate some distance before commg to rest.

d. Because of none of these.

a. latitude.

b. depth.

c. altitude.

d. all of these.

a. It is easier to pull than to push a lawn roller.

b. It is easier to push than Ito pull a lawn roller.

c. It requires the same amount of 'effort whether a lawu rollcr is to be pushed or pulled.

d. None of these.

a. speed.

b. velocity,

c. momentum.

d. mass.