Forces Pre-Test

Which of these words best gives the idea of a force.

[You can choose more than one]

• push

• pressure

• energy

• pull

• motion

The unit used by scientist to measure a force is called...

• Metres

• Kilograms

• Metres per second per second

• Newtons

What is the net force on the box shown?

• 10 N to the left

• 10 N to the right

• 60 N to the left

• 50 N to the right

A ball is rolling along a flat surface and stops. Which of these explain this best. [choose one]

• The ball ran out of force.

• The ball just stopped naturally.

• Gravity caused the ball to stop.

• Friction caused the ball to stop.

A skate boarder is moving down a gentle sloping road. She is travelling at a constant speed. She is not speeding up or slowing down. Which of these statements is true:

• There is no net (total) force acting on the skateboarder.

• There must be a net force on the skateboarder because she is moving.

A ball is being held by a hand. The hand is then quickly dropped. The instant after the ball is let go, but before it starts to drop down, would there be a force acting on the ball?

• No, it is not moving yet.

• Yes, there is gravity.

A person is pushing against a brick wall. Is the person putting a force on the wall?

• Yes

• No

A person is pushing against a brick wall. Is the wall putting a force on the person (i.e. pushing back)?

• Yes

• No

A car is parked on a hill. It is stationary (not moving). Which of the following statements is correct?

• There are many forces acting on the car, but the net (total) force is zero.

• There are many forces acting on the car and the net (total) force is backwards.

• There are no forces acting on the car at all.

A tennis ball is thrown straight up into the air. If the ball is on the way up, then the net force on the ball is shown by which diagram?

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