Study Guide: Newton's Laws and Forces

Newton's Laws and Force Review

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Multiple Choice

What is a force?

• the PUSH or PULL on an object

• The MOTION an object creates

• The objects HITTING one another

• Going REALLY FAST

Multiple Choice

What is the unit for FORCE?

• N (Newtons)

• lbs (pounds)

• g (grams)

• m/s (meters per second)

Multiple Choice

Which one is balanced?

• top

• bottom

• both

Multiple Choice

What is the net force?

• 5 N

• 45 N to the left

• 5 N to the right

• 45 N to the right

Multiple Choice

Friction _____________ motion

• Works in the same direction as

• Opposes

• Has not effect on

• Pulls against

Multiple Choice

True or False: objects that are smooth have LESS friction than objects that are rough

• TRUE

• FALSE

Multiple Choice

TRUE or FALSE if you push a box across a surface like rough wood with a lot friction, it will NEVER stop

• TRUE, as long as it doesn't run into something it will keep going and going and going

• FALSE, it will stop very quickly

Multiple Choice

TRUE or FALSE if you push a box across a surface like Ice with no friction, it will NEVER stop

• TRUE, as long as it doesn't run into something it will keep going and going and going

• FALSE, it will stop very quickly

Multiple Choice

Object at rest stays at rest.

• 1st

• 2nd

• 3rd

Multiple Choice

What law is best described by inertia?

• 1st

• 2nd

• 3rd

Multiple Choice

A person not paying attention while skateboarding hits a rock. The skateboard stops...they don't.

• The Law of Inertia

• The Law of Acceleration

• The Law of Conservation of Momentum

Multiple Choice

Force = Mass x Acceleration

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

• Newton's 4th Law

Multiple Choice

If a 10 kg object accelerates suddenly at 15 m/s², how much force was applied to the object?

• 150 Newtons

• 15 Newtons

• 150 kilograms

• 100 kilograms

Multiple Choice

A 10 kg object is accelerated upward at 2 m/s². What force is required?

• 20 N

• 2 N

• 5 N

• 0 N

Multiple Choice

A cannonball with a mass of 10 kg is flying at an acceleration of 5 m/sec/sec. What is it's force?

• 50 Newtons

• 5 Newtons

• 20 Newtons

• 9.5 Newtons

Multiple Choice

Equal and Opposite

• 1st

• 2nd

• 3rd

Multiple Choice

Action/Reaction

• 1st

• 2nd

• 3rd

Multiple Choice

Forces always act in equal and opposite pairs.

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

• Newton's 4th Law

Multiple Choice

The momentum of an object depends upon the object's ___________&_____________.

• size and shape

• mass and speed

• mass and veloctiy

• mass and energy

Multiple Choice

The equation to calculate momentum is

• p=mv

• p=1/2mv²

• p=mgh

• p=mg

Multiple Choice

If an object has a mass of 20 kg and a velocity of 4 m/s, what is the momentum of the object?

• 80 kgm/s

• 4 kgm/s

• 5 kgm/s

• .2 kgm/s

Multiple Choice

Which object listed below has the greatest momentum?

• A 0.05 kg object rolling at 0.2 m/s.

• A 0.15 kg object rolling at 2 m/s.

• A 0.15 kg object rolling at 1 m/s

• A 0.4 kg object rolling at 2 m/s.

Multiple Choice

If an object has a mass of 20 kg and a velocity of 4 m/s, what is the momentum of the object?

• 80 kgm/s

• 4 kgm/s

• 5 kgm/s

• .2 kgm/s

Multiple Choice

Which of the following has the MOST momentum?

• rolling ping-pong ball

• rolling bowling ball

• rolling soccer ball

• rolling basketball

Multiple Choice

Which object has more momentum?

• motorcycle at 15 mph?

• bike at 15 mph

• car at a stoplight

• runner at 10 mph

Multiple Select

Which is the most important factor in an object's momentum?

(2 answers)

• shape

• mass

• velocity

• volume

Multiple Choice

If an object has a momentum of 40 kgm/s and a mass of 60 kg, what is it's velocity?

• 2400 m/s

• 1.5 m/s

• 240 m/s

• .67 m/s

Multiple Choice

If an object has a velocity of 15 m/s and a momentum of 30 m/s, what is its mass?

• 450 m/s

• 2 m/s

• 4,500 m/s

• .5 m/s

Multiple Choice

An object has a mass of 5 kg, a displacement of 5 m, and a time of 25 s, what is its momentum?

• 1 kgm/s

• 750 kgm/s

• 25 kgm/s

• 625 kgm/s