Semester 2 Final Exam Physical Science May 2019

A car is driven for 3 hours. What else do you need to know to describe this car’s speed?

• the road the car in driven on
• the time of day
• the distance the car is driven
• the number of passengers in the car

What is speed?

• how much an object’s position changes
• how far an object moves
• how long an object moves
• how far an object moves in a certain amount of time

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What is a force?

• a push or pull
• speed or acceleration 
• potential or kinetic energy
• balanced or unbalanced force

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When objects remain in the same place, it is called...

• gravity
• friction
• balanced force
• unbalanced force

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What is the force that causes everything to be pulled down to the Earth?

• friction
• gravity
• balanced
• unbalanced

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Force is measured in....

• Galileos 
• Newtons
• Di Vincis
• Einsteins 

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An unbalanced force is when objects move in one direction because the force is greater from that direction.

• true
• false

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Inertia is....

• for every action, there is an equal and opposite reaction
• larger objects take more force to move 
• an object in motion tends to stay in motion unless acted on by an opposite force
• a push that acts in the opposite direction and it slows down.

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What is a force that works AGAINST MOTION?

• Force
• Motion
• Gravity
• Friction

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If these boys 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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