TCI Forces & Energy Lesson 3 Effects of Force

The net force of forces 15 N and 30 N is ______.

• 2 N

• 15N

• 45 N

• 450 N

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NGSS.MS-PS2-2

The net force on an object is found by

• adding the forces.

• dividing the forces.

• subtracting the forces

• multiplying the forces

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NGSS.MS-PS2-2

For forces acting in opposite directions, the net force is found by

• adding the forces.

• dividing the forces.

• subtracting the forces.

• multiplying the forces.

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NGSS.HS-PS2-1

The difference between balanced and unbalanced forces is that

• balanced forces are multiples of 5 N, while unbalanced forces are not.

• balanced forces have a net force equal to 0 N, while unbalanced forces do not.

• balanced forces have a net force unequal to 0 N, while unbalanced forces are equal to 0 N.

• balanced forces have multiple forces that are equal to the same number, while unbalanced forces do not.

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NGSS.3-PS2-1

Which of the following is NOT a component of Newton’s first law of motion?

• An object at rest stays at rest.

• An object in motion stays in motion.

• An object in motion has a constant velocity unless acted on by a balanced force.

• An object in motion has a constant velocity unless acted on by an unbalanced force.

The net force on an object that is at rest

• is always 0 N.

• changes depending on the location of the object.

• is the result of unbalanced forces acting on the object.

• depends on the balanced forces acting on the object.

What is most likely to happen to a moving object with a net force of 0 N?

• It will likely accelerate.

• It will slowly come to a rest.

• It will come to a complete stop.

• It will continue to move with the same velocity

Brakes acting on a train car is an example of

• the net force on an object being positive.

• the net force on an object slowly increasing.

• the net force an object remaining the same over time.

• the net force on an object being equal to one force on the object.

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NGSS.MS-PS2-2

What problem did Newton’s first law of motion require Nils Bohlin to overcome when designing the seatbelt?

• A person’s body would continue to move forward during a head-on collision.

• A person’s body would suddenly stop while the car continues to move forward.

• A person wearing a seatbelt has a difficult time moving at the same speed as the car.

• A person’s body would stop too quickly because the forces exerted on them are very strong.

Which of the following is NOT a criterion for Bohlin’s seatbelt?

• The seatbelt needed to be comfortable.

• The seatbelt needed to be secured using one hand.

• The seatbelt needed to come in a variety of colors.

• The seatbelt needed to hold both the upper and lower parts of a person’s body.

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NGSS.MS-ETS1-1