Newton's Laws of Motion

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What is gravitational pull?

A force that pushes upward from a surface

A force that attracts objects toward Earth

A force that only acts when objects are moving

A force that resists motion

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What is inertia?

The same as friction

The force of gravity

A force that causes acceleration

The tendency of an object to resist changes in motion

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What is friction?

A force that opposes motion between surfaces in contact

A pulling force from gravity

A force that increases speed

A force that acts only upward

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What is the normal force?

The same as weight

The force pulling downward on an object

A force that slows objects down

A force pushing up from a surface

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What is weight?

A measure of inertia

Measured in kilograms

The force of gravity acting on an object

The amount of matter in an object

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What is net force?

Only horizontal forces

The strongest force acting on an object

Only upward forces

The total of all forces acting on an object

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Balanced forces cause an object to:

Increase speed

Have no change in motion

Change direction

Accelerate

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Acceleration is:

Speed only

Distance divided by time

A change in velocity

Mass times force

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If the net force on an object is zero, the forces are:

Increasing

Balanced

Accelerating

Unbalanced

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Mass is:

A measure of how much matter an object has

Measured in newtons

Dependent on location

The force of gravity

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A book remains at rest on a table until someone pushes it. Which law is this?

Law of Gravity

Newton’s Second Law

Newton’s Third Law

Newton’s First Law

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A soccer ball accelerates more when kicked harder. Which law is this?

Law of Friction

Newton’s Third Law

Newton’s First Law

Newton’s Second Law

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When a cannon fires, the cannonball moves forward and the cannon recoils backward. Which law is this?

Newton’s Third Law

Newton’s First Law

Newton’s Second Law

Law of Acceleration

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A swimmer pushes water backward and moves forward. Which law is this?

Newton’s Third Law

Newton’s First Law

Newton’s Second Law

Law of Inertia

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A heavy truck takes longer to stop than a small car. Which law best explains this?

Newton’s First Law

Law of Gravity

Newton’s Second Law

Newton’s Third Law

What is gravitational pull?

A force that pushes upward from a surface

A force that attracts objects toward Earth

A force that only acts when objects are moving

A force that resists motion

What is inertia?

The same as friction

The force of gravity

A force that causes acceleration

The tendency of an object to resist changes in motion

What is friction?

A force that opposes motion between surfaces in contact

A pulling force from gravity

A force that increases speed

A force that acts only upward

What is the normal force?

The same as weight

The force pulling downward on an object

A force that slows objects down

A force pushing up from a surface

What is weight?

A measure of inertia

Measured in kilograms

The force of gravity acting on an object

The amount of matter in an object

What is net force?

Only horizontal forces

The strongest force acting on an object

Only upward forces

The total of all forces acting on an object

Balanced forces cause an object to:

Increase speed

Have no change in motion

Change direction

Accelerate

Acceleration is:

Speed only

Distance divided by time

A change in velocity

Mass times force

If the net force on an object is zero, the forces are:

Increasing

Balanced

Accelerating

Unbalanced

Mass is:

A measure of how much matter an object has

Measured in newtons

Dependent on location

The force of gravity

A book remains at rest on a table until someone pushes it. Which law is this?

Law of Gravity

Newton’s Second Law

Newton’s Third Law

Newton’s First Law

A soccer ball accelerates more when kicked harder. Which law is this?

Law of Friction

Newton’s Third Law

Newton’s First Law

Newton’s Second Law

When a cannon fires, the cannonball moves forward and the cannon recoils backward. Which law is this?

Newton’s Third Law

Newton’s First Law

Newton’s Second Law

Law of Acceleration

A swimmer pushes water backward and moves forward. Which law is this?

Newton’s Third Law

Newton’s First Law

Newton’s Second Law

Law of Inertia

A heavy truck takes longer to stop than a small car. Which law best explains this?

Newton’s First Law

Law of Gravity

Newton’s Second Law

Newton’s Third Law

A $5\text{ kg}$ object accelerates at $2\text{ m/s}^2$. What is the net force?

$2\text{ N}$

$7\text{ N}$

$20\text{ N}$

$10\text{ N}$

A force of $20\text{ N}$ acts on a $4\text{ kg}$ object. What is the acceleration?

$4\text{ m/s}^2$

$80\text{ m/s}^2$

$16\text{ m/s}^2$

$5\text{ m/s}^2$

A force of $40\text{ N}$ is applied to an $8\text{ kg}$ box. What is the acceleration?

$32\text{ m/s}^2$

$5\text{ m/s}^2$

$48\text{ m/s}^2$

$320\text{ m/s}^2$

A box rests on a table. Which forces act on the box?

Friction and gravity

Gravity only

Gravity and normal force

Applied force only

A $10\text{ kg}$ object experiences a net force of $50\text{ N}$. What is the acceleration?

$500\text{ m/s}^2$

$60\text{ m/s}^2$

$5\text{ m/s}^2$

$10\text{ m/s}^2$

A box accelerates to the right. What must be true about the net force?

It acts upward

It is zero

It acts to the right

It acts to the left

A box is pushed to the right across a table. Which force acts opposite the motion?

Normal force

Gravity

Net force

Friction

A $3\text{ kg}$ object accelerates at $4\text{ m/s}^2$. What is the net force?

$12\text{ N}$

$7\text{ N}$

$1\text{ N}$

$0.75\text{ N}$

A box moves to the right at constant speed. What must be true about the horizontal forces?

The rightward force is larger

The horizontal forces are balanced

There are no horizontal forces

The leftward force is larger

A box is pushed equally, with $5\text{ N}$ from both sides and does not move. What is the net force?

$5\text{ N}$

$10\text{ N}$

$0\text{ N}$

$1\text{ N}$

A student pulls a box to the left with $40\text{ N}$. Friction is $15\text{ N}$ to the right. (Normal force and gravity are balanced.) What is the net horizontal force on the box?

$55\text{ N}$ to the left

$25\text{ N}$ to the right

$0\text{ N}$

$25\text{ N}$ to the left

A box slides to the right at a constant speed. A student pushes it with $25\text{ N}$ to the right. Friction pushes back with $15\text{ N}$ to the left. (Gravity and normal force are balanced.) What is the net force on the box?

$10\text{ N}$ to the right

$15\text{ N}$ to the right

$15\text{ N}$ to the left

$10\text{ N}$ to the left

A box is pushed to the right. The applied force is $30\text{ N}$ to the right and friction is $10\text{ N}$ to the left. (Normal force and gravity are balanced.) What is the net horizontal force on the box?

$40\text{ N}$ to the right

$10\text{ N}$ to the right

$20\text{ N}$ to the right

$0\text{ N}$

A sled is pulled to the right with $90\text{ N}$. Friction is $30\text{ N}$ to the left. The sled accelerates at $4\text{ m/s}^2$. What is the mass of the sled?

$10\text{ kg}$

$15\text{ kg}$

$30\text{ kg}$

$20\text{ kg}$

A $5\text{ kg}$ box is pushed with $60\text{ N}$ to the right. Friction is $10\text{ N}$ to the left. (Normal force and gravity are balanced.) What is the acceleration of the box?

$2\text{ m/s}^2$

$5\text{ m/s}^2$

$10\text{ m/s}^2$

$12\text{ m/s}^2$