Newton's Laws and Forces

Acceleration toward the center of a curved path is called ____ acceleration.

The SI unit of force is the

• kg, kilogram

• N, Newton

• m, meter

• J, Joule

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NGSS.MS-PS2-2

When an unbalanced force acts on an object,

• the object's motion does not change.

• the object accelerates.

• the weight of the object decreases.

• the inertia of the object increases.

Tags

NGSS.MS-PS2-2

According to Newton’s second law of motion, the acceleration of an object equals the net force acting on the object divided by the object’s

• mass

• momentum

• velocity

• weight

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NGSS.MS-PS2-2

If a force of 10 N is applied to an object with a mass of 1 kg, the object will accelerate at

• 0.1m/s/s

• 9m/s/s

• 10m/s/s

• 11m/s/s

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NGSS.MS-PS2-2

Newton's third law of motion describes

• action and reaction forces.

• balanced forces.

• centripetal forces.

• net force.

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NGSS.MS-PS2-1

In which of the following are action and reaction forces involved?

• when a tennis racket strikes a tennis ball

• when stepping from a curb to a street

• when rowing a boat

• all of the above

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NGSS.MS-PS2-1

If the forces acting on an object produce a net force of zero, the forces are called

• balanced forces

• inertia

• zero

• equals

Which of the following relationships is correct?

• 1N = 1kg

• 1N = 1kg-m

• 1N = 1kg-m/s

• 1N = 1kg-m/s/s

Tags

NGSS.HS-PS2-1

As you push a cereal box across a tabletop, the sliding friction acting on the cereal box

• acts in the direction of motion.

• equals the weight of the box.

• is usually greater than static friction.

• acts in the direction opposite of motion.

Tags

NGSS.MS-PS2-2