Forces (Dynamics) Test

A free-body diagram represents all of the following except

• the object.

• forces as vectors.

• forces exerted by the object.

• forces exerted on the object.

Tags

NGSS.HS-PS2-3

The arrow head of a force vector represents the

• cause of the force.

• direction of the force.

• magnitude of the force.

• type of force.

Which of the following is the cause of an acceleration?

• speed

• inertia

• force

• velocity

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NGSS.MS-PS2-2

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A 15-N force and a 45-N force act on an object in the same directions. What is the net force on the object?

• 15 N

• 30 N

• 45 N

• 60 N

Tags

NGSS.MS-PS2-2

Which of the following is the tendency of an object to maintain its state of motion?

• acceleration

• inertia

• force

• velocity

According to Newton’s second law, when the same force is applied to two objects of different masses,

• the object with greater mass will experience a great acceleration, and the object with less mass will experience an even greater acceleration.

• the object with greater mass will experience a greater acceleration, and the object with less mass will experience a smaller acceleration.

• the object with greater mass will experience a smaller acceleration, and the object with less mass will experience a greater acceleration.

• the object with greater mass will experience a small acceleration, and the object with less mass will experience an even smaller acceleration.

Tags

NGSS.MS-PS2-2

Gravitational force is also known as

• frictional force.

• weight.

• inertia.

• mass.

Tags

NGSS.MS-PS2-2

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After a cannonball is fired into frictionless space, the amount of force needed to keep it going equals

• zero, since no force is necessary to keep it moving.

• twice the force with which it was fired.

• one half the force with which it was fired.

• the same amount of force with which it was fired.

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

Friction

• is the name given to the force acting between surfaces sliding past one another.

• acts in a direction that opposes the motion of an object.

• all of the above

• none of the above

How much does a 3.0-kg bag of bolts weigh?

• 7.2 N

• 14.4 N

• 22.8 N

• 29.4 N

• 58.8 N

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4