G3 Ch8 L3,4

The force of gravity between two objects depends on the difference in their mass and the distance between them.

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You can measure the force of gravity on an object by a:

• Barometer.

• Spring scale

• Magnet.

• Thermometer.

Look at the picture. You will need to apply a force of ____ Newtons to move the apple.

• 1 N.

• 2 N.

• 3 N.

• 4 N.

How many forces act on the bag?

• 1 force.

• 2 forces.

• 3 forces.

• No forces.

The net force of any object at rest is:

• More than zero.

• Equal to zero.

• Less than zero.

The gravity of Earth is more than 3 times that of mars. If you know that a rabbit's weight is 18 newtons on Earth, how much would the rabbit weigh on Mars?

• 18 N.

• 6 N.

• 3 N.

• 1 N.

The force of gravity on Earth is greater than that on the Moon. Your mass on Earth is:

• Greater than on the Moon.

• Less than on the Moon.

• The same as on the Moon.

Which photo shows balanced forces?

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The sword represents a simple machine, it is a:

• Screw.

• Lever.

• Pulley.

• Wedge.

The mass will be the same at the bottom and the top of the mountain.

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