Newton's 2nd Law of Motion

Forces and Motion

• Forces can create

changes in motion
(acceleration or
deceleration).

• Motion: is a change in

position over a period
of time.

Unbalanced Forces

Are forces that result

in an object’s motion being changed.

Multiple Choice

It takes _______ force to move a larger/more massive object.

• more

• less

• same

• an equal amount of

Multiple Choice

Which type of force(s) will cause a change in an object's motion?

• gravity
• zero net force
• balanced forces
• unbalanced forces

Net Force

The sum of all the
forces acting on an
object.

Newtons: unit
used to measure
Force

Net Force:

50 Newtons

Multiple Choice

What unit is Force measured in?

• Nanograms (ng)

• Newtons (N)

• Kilograms (Kg)

• meters per second (m/s)

Mass

• The amount of matter in an object

object, measured in
kilograms (kg)

Multiple Choice

What is the unit for mass?

• meter (m)

• meters per second squared (m/s²)

• kilogram (kg)

• Newton (N)

Multiple Choice

_______ is the amount of matter in an object (location doesn't matter)

• Weight

• force

• Mass

• friction

Inertia

An object’s tendency to resist motion

(Newton’s 1st Law)

Multiple Choice

What is the net force on a car with a mass of 1000kg, if it accelerates at 35 m/s²?

$$f\ =\ m\times a$$  

• 1000 x 35 = 35,000 N

• 1000/35 = 28.6 N

• 35/100 = 0.035 N

• Not enough information is provided to answer this question correctly.

Multiple Choice

A student pushes a box to right with a force of 10N while a young boy pushes the box to the left with a force of 8N. What is the sum of all forces on the box? 

• 18N left
• 18N right
• 2N right
• 2N left

Open Ended

How did the astronaut demonstrate Newton's Second Law? Explain in detail (3 sentences minimum)

Gravitational acceleration is 9.8 m/s/s.

​

Gravitational Force vs. Gravity

Newton’s 2nd Law of Motion

• 2nd Law States that a

force on an object will move the object in the direction of the force.

• F = m x a

UNIT for Force:
Newtons (N)
UNIT for mass:
Kilograms (Kg)
UNIT for acceleration:
m/s²

Force

• A force is a push or

a pull.

• F = m x a

Multiple Choice

Objects that INCREASE in mass (heavier), causes the acceleration to....

• increase

• decrease

• stay the same

• not move

(A) 4 N
(B) 8 N
(C) 20 N
(D) 40 N

A man hits a golf ball (0.2 kg)
which accelerates at a rate of
20m/s/s. What amount of force
acted on the ball?

Multiple Choice

What is the formula for the 2nd law of motion?

• a = lw

• F = mama

• F = ma

• F = llama

Multiple Choice

A 20 kg bike accelerates at 10 m/s². what was the force?

F = m x a

• 25 Newtons

• 20 Newtons

• 200 Newtons

• 10 Newtons

Multiple Choice

7.) An object with a mass of 120 kg. has a force of 12,000 newtons applied to it. What is the resulting acceleration of the object?

• 150 m/s²

• 200 m/s²

• 100 m/s²

Multiple Choice

The masses of four objects are given in this table. If all objects are struck with the same amount of force, which one will have the greatest acceleration?

• Object 1
• Object 2
• Object 3
• Object 4

Multiple Choice

4.) An object accelerates 100 m/s² when a force of 15,000 newtons is applied to it. What is the mass of the object?

• 105 kg.

• 150 kg.

• 510 kg.

Multiple Choice

You pull a wagon with your younger sister in it. Which of these would accelerate the rate at which you can pull the wagon?

• pull the wagon with less force
• Pull the wagon with more force
• Have your sister push down on the wagon
• Put another of your siblings in the wagon