grade 4 , con 4 , lesson 1 &2

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.

When you move something away from 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 tug-of-war game, two teams

• pull the rope in the same direction.

• push the rope in the same direction.

• pull the rope in opposite directions.

• push the rope in opposite directions.

In the tug-of-war game, when two teams are pulling a rope, and the rope does not move toward any team, this means that

• equal forces are being applied on the rope in the same direction.

• equal forces are being applied on the rope in opposite directions.

• unequal forces are being applied on the rope in the same direction.

• unequal forces are being applied on the rope in opposite directions.

Which of the following is an example of unbalanced forces ?

• Two children push a box with the same force in opposite directions.

• Two children play on a seesaw without its moving up or down.

• Two children play on a seesaw, that moves up and down.

• Two teams play the tug-of-war game while the rope doesn't move.

All of the following are examples of motion, except

• a running person.

• a ball travelling through the air.

• a flying bird.

• a sleeping dog.

Two equal forces act at the same time on a stopping object but in opposite directions. Which sentence describes the object's state?

• The object stays in its place without moving.

• The object speed decreases.

• The object speed doesn't change.

• The object speed increases.