grade 4 , con 4 , lesson 2

All objects around us can move by the effect of

• pushing force only.

• pulling force only.

• pushing and pulling forces.

A ball may move away from the foot of a football player by the effect of

• pushing force only.

• pulling force only.

• pushing and pulling forces.

When an object is in motion, this means that its changes)

• color

• shape

• size

• position

• sound and light energies.

When you sit on a chair, the force of gravity .... holding you in the chair

• pulling you upward.

• pulling you downward.

• pushing you upward.

• pushing you downward.

What makes a ball in the air fall down to the ground ?

• Friction force.

• Gravity force.

• Sound energy.

• Light energy.

Which of the following will cause an object to move?

• Balanced forces.

• Unbalanced forces.

• Sound energy.

• Light energy.

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.