Starter quiz
- When one object pushes or pulls on another object, what do we call the push or pull?
- force ✓
- energy
- power
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- A force is always a ______ or a pull.
- 'push' ✓
- If they were thrown at the same speed, would a tennis ball (60 g) or a cricket ball (160 g) be harder to stop?
- the tennis ball
- the cricket ball ✓
- they would be equally hard to stop
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- Which one of these is a force?
- a waterfall
- electric current
- a car's engine
- the push of your hand on a door ✓
- the movement of a rolling ball
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- Forces make things change. Which of the following statements are true?
- Forces can change an object's shape. ✓
- Forces can change the direction of an object's motion. ✓
- Forces can change the material an object is made of.
- Forces can change the speed of an object. ✓
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- Which of the following forces act on the moving speedboat? The speedboat is driving forwards.
- A gravitational force (a downwards pull from Earth). ✓
- An upthrust force (an upwards push from the water). ✓
- Air resistance (a backwards force from the air as the boat moves through it). ✓
- Drag (a backwards force from the water, sometimes called 'water resistance'). ✓
- A forwards force caused by the boat's motor. ✓
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