grade 4 , con 4 , lesson 1

Push or pull actions are considered as types of

• force.

• device.

• energy.

• Adaptation

When you kick a ball, it moves due to the effect of

• pulling force only.

• pushing force only

• pushing and pulling forces.

• sound energy only

When you move something away from you, this represents

• pushing force.

• light energy.

• Pulling force

• Sound energy

When you move something toward you, this represents

• pushing force.

• light energy.

• Pulling force

• Sound energy

The speed of a normal truck is more than that of

• a jet airplane only.

• a jet airplane and a rocket.

• a rocket and a bicycle.

• a bicycle only

Parachutes are used in the Shockwave truck to

• increase its speed.

• decrease its speed.

• keep its speed as it is.

• change its direction.

In the Shockwave truck, the three jet engines,

• Don't affect its speed

• decrease its speed.

• Stop its motion

• increase its speed.

By increasing the number of fire extinguishers fixed to a cart, its speed

• increases.

• decreases.

• doesn't change.

• becomes zero.

All the following motions occur by the effect of pulling force, except

• kicking a ball.

• opening a closed drawer.

• wearing your socks.

• lifting up a bag from the ground.

The of the air that comes out of fire extinguishers causes the movement of a cart forward.

• pulling force

• light energy

• pushing force

• sound energy