Forces

What do we call a force that has a net force of zero Newtons and the object does not change its motion?

• balanced force

• unbalanced force

• acceleration force

• net force

What is the magnitude and direction of the force in the free body diagram shown?

• 2000 N forward

• 800 N backward

• 1200 N forward

• 2800 N forward

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A magician pulls a tablecloth out from under dishes and glasses on a table without disturbing them.

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• None of them

A person’s body is thrown outward as a car rounds a curve on a highway.

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• None of them

Rockets are launched into space using jet propulsion where exhaust accelerates out from the rocket and the rocket accelerates in an opposite direction.

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

• None of them

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A picture is hanging on a wall and does not move.

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• None of them

A person not wearing a seatbelt flies through a car window when someone slams on the breaks because the person’s body wants to remain in continuous motion even when the car stops.

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• None of them

Acceleration is produced when a force acts on a mass. The greater the mass (of the object being accelerated) the greater the amount of force needed (to accelerate the object).

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• None of them

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A soccer ball accelerates more than a bowling ball when thrown with the same force.

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• None of them

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An inflated balloon released from rest moves horizontally.

The law that best explains this event is

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

• Law of Gravity

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