Force, Motion and Simple Machines Review

A brick and a pencil are dropped at the same time from the same height. Which one would hit the ground first?

• brick

• pencil

• both would hit at the same time

• they would both float away and never hit the ground

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Without gravity we would________.

• Float away

• Stay on the ground

• Nothing would happen

• We would all turn in to skittles

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Why can astronauts jump and float a little on the Moon?

• Because gravity on the moon is less (weaker) than it is on earth.

• Because gravity on the moon is more (stronger) than it is on earth

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If an object is not moving the forces acting upon it are _____________

• unbalanced
• weak
• balanced
• Hulk Smash!

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If these teams are pulling with the same amount of force what will happen?

• The boy in blue will win.
• They will not move at all.
• The boy in red will win.
• Both will fall down.

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What will cause an object to move?

• balanced gravity

• balanced forces

• unbalanced forces

• the same amount of force in opposite directions

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A lamp sitting on a table is a __________ .

• balanced Force

• unbalanced Force

Which of the following is an example of an unbalanced force?

• a tree falling down

• a parked car

• a child standing still

• a water bottle sitting on the desk

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The lid or cap to a bottle or jar is an example of a ___________________.

• wedge
• lever
• screw
• gear

Leo is using a ramp to move a heavy load into a building. What simple machine is he using?

• screw
• wheel
• wedge
• incline plane