Hewitt Chapter 9 Force

The force that pulls things toward earth.

• Speed
• Gravity
• Frictional
• Nature

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Striking a moving tennis ball:
changes its _____ and _____ .

• direction, speed
• speed, shape
• shape, speed
• shape, direction

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At the start of a football game, a footballer kicks a ball placed in the middle of the field to move the ball.

What is the effect of force on the object?

• Change the direction of a moving object

• Make a moving object stop

• Make a moving object move slower

• Make a stationary object move

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What is force?

• A push exerted on an object

• A push or pull exerted on an object

• A pull exerted on an object

• None of the above

In a football game, the goalkeeper stops a moving ball to prevent it from entering the goal.
What is the motion of the object?

• Change the direction of a moving object
• Make a moving object stop
• Make a moving object move slower 
• Make a stationary object move

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In a football game, the footballers kick the rolling ball to make it move even faster.
What is the motion of the object?

• Change the direction of a moving object
• Make a moving object stop
• Make a moving object move faster
• Make a stationary object move

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A push is ______________.

• a force to move something away

• a force to move something towards you

• gravitational potential energy

• kinetic energy

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A pull is ________________.

• a force to move something away

• a force to move something towards you

• gravitational potential energy

• kinetic energy

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What is the S.I. unit of Force?

• watt (W)

• hertz (Hz)

• newton (N)

• joule (J)

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Force is applied as a 'pull' when:

• children play 'tug of war'

• rickshaw driver moves a cycle rickshaw

• a bull moves a bullock cart

• all of the above

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