P3 Science - Chp 7 - Force and Friction

Pushes and pulls are _____.

• forces

• friction

• energy

A force used to move an object away from you is called a _____.

• push

• pull

• friction

The bigger the push or pull, the ____ the force.

• smaller

• bigger

• longer

During the tug of war, Cayden tries to pull the rope as strongly as he can toward himself.
Cayden _____ the rope.

• cuts

• pushes

• pulls

Kimika makes an experiment.
First, she pushed a toy car with a small push and then measured how far it moved.
Second, she pushed the same toy car with a medium push, then measured how far it moved.
Third, she pushed the same toy car with a big push, then measured how far it moved.
Why does Kimika need to measure the distance each time?

• To note the result and get the correct conclusion.

• To know what to do next.

• To ensure that the toy car isn't broken.

Kimika makes an experiment.
First, she pushed a toy car with a small push and then measured how far it moved.
Second, she pushed the same toy car with a medium push, then measured how far it moved.
Third, she pushed the same toy car with a big push, then measured how far it moved.
She used the same toy car every time to make a fair experiment. What else needs to be the same?

• The energy she used to push.

• The surface where the toy car moved.

• The distance made by the toy car.

Kimika makes an experiment.
First, she pushed a toy car with a small push and then measured how far it moved.
Second, she pushed the same toy car with a medium push, then measured how far it moved.
Third, she pushed the same toy car with a big push, then measured how far it moved.
What tool do you think she needed to measure the distance?

• protractor

• weighing scale

• measuring tape

Kimika makes an experiment.
First, she pushed a toy car with a small push and then measured how far it moved.
Second, she pushed the same toy car with a medium push, then measured how far it moved.
Third, she pushed the same toy car with a big push, then measured how far it moved.
Why did she only change ONE thing and keep everything else the same?

• Because it is easier.

• Because it makes the fair test

• Because she didn't do it correctly.

The picture shows the result of Kimika's experiment, where she pushed a toy car through the same surface with different sizes of push force she gave to the toy car.

What do you think is the correct conclusion?

• There is no evidence that the size of the force affected the distance the car moved.

• The bigger the force, the shorter the distance the car moved.

• The bigger the force, the further the distance the car moved.

Chrissanli pushes a ball on a thick green carpet with a medium push.
Then he pushes the same ball on the floor with the same force.
He measures each distance and finds that on the carpet the toy car reaches a shorter distance.

Which prediction is likely correct?

• The smoothness of the surface affects the distance.

• The colour of the surface affects the distance.

• The distance measuring is not correct, the distance must be the same.