Unit 3.1: Forces and Motion - Cambridge LS Science

What is the standard unit used to measure force?

In a force diagram, what does the arrow represent?

• The direction of the force

• The size of the force

• The speed of the object

• The type of force

What is the name of the force that pulls objects toward the centre of the Earth?

If two forces acting on an object are equal in size and opposite in direction, they are said to be what?

Which force opposes motion when an object tries to slide across the ground?

• Gravity

• Contact force

• Friction

• Weight

What piece of equipment is used to measure force?

• Thermometer

• Newton meter

• Ruler

• Stopwatch

Forces can act on an object even if the object is not moving.

• True

• False

If the forces acting on an object are balanced, the object will:

• Speed up

• Slow down

• Change direction

• Have no change in its movement

When a rock sits on the ground, what is the name of the force pushing up from the ground that balances its weight?

Complete the sentence: Unbalanced forces can make an object speed up, slow down, or change (a)   .