P4 - Science - Worksheet Unit 7

Name

1. What is the force acting on the skateboarder as she moves down the slope?

• a. Gravitational force
• b. Magnetic force
• c. Electric force
• d. Muscular force

2. Which of the following is not a useful effect of frictional force?

• A car slowing down in front of a traffic lighti
• A bicycle chain making noises when pedalling
• A matchstick lighting up after being stroked on a rough surface
• A man walking on ice without slipping

3. One of the characteristics of....................... surfaces rub against each other.

• muscular force
• magnetic force
• frictional force
• gravitational force

4. Electric force causes the paper to be ... to the baloon

• repulsed
• ignored
• repelled
• attracted

5. gravitional force keeps the earth orbiting....

• the asteroid
• the stars
• the moon
• the sun

6. Magnetic amterials are the materials that can be attracted by ....

• magnet
• electricity
• muscle
• gravitation

7. A force between objects that are not touching each other is called

• frictional force
• muscular force
• contact force
• non contact force

8. After matchstick is being stroked an arough surface, it causes the match stick to ight up. This happens because of..

• Muscular force
• frictional force
• magnetic force
• electric force

9. a force caused by pushing and pulling actions of magnet is called...

• muscular force
• frictional force
• magnetic force
• electric force