Physics

The force of gravity on a person or object on the surface of a planet is called

• mass.

• weight.

• terminal velocity

• free fall.

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The law of universal gravitation states that any two objects in the uni-verse that have mass, without exception,

• attract each other.

• repel each other.

• combine to provide a balanced force.

• create friction

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According to the law of conservation of momentum, when two objects collide in the absence of outside forces,

• velocity decreases

• velocity increases

• the objects have the same momentum before and after they collide.

• the objects have more momentum after they collide than they did before.

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What is this?

This airplane is traveling at 500 mph, West

• Speed

• Velocity

• Acceleration

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What does this graph represent?

• Constant Speed

• Acceleration

• Deacceleration

• Not moving

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At point (a)   is kinetic energy greatest. 

• W

• X

• Y

• Z

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Any force that causes an object to move in a circle is called a(n)

• balanced force

• gravitational force.

• unbalanced force

• centripetal force

According to Newton’s third law of motion, when a hammer strikes and exerts force on a nail, the nail

• creates a friction with the hammer.

• disappears into the wood.

• exerts an equal and opposite force on the hammer.

• moves at a constant speed.

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The overall force on an object after all the forces are added together is called the

• balanced force

• unbalanced force

• net force

• centripetal force

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The force of gravity between you and Earth is greater than the force of gravity between you and a car because Earth has more ____________________ than the car.

• mass

• density

• force

• friciton

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