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Physics I Unit 3B - Forces

Total questions: 40

Worksheet time: 17mins

Name
Class
Date
1.

What variable represents the Force of Gravity?

a)

gg

b)

Fg

c)

Fn

d)

−10ms2-10\frac{m}{s^2}

2.

What does μ stand for?

a)

Coefficient of Friction

b)

Force of Friction

c)

A variable for an angle

d)

Force of Gravity

3.

A 50 kg object is being pushed with a force of 100N and accelerates at .5 m/s/s. Find μ

a)

1.31

b)

0.15

c)

0.9

d)

0.31

4.

What influences an object's inertia?

a)

Force

b)

Height

c)

Mass

d)

Speed

5.

In which examples is an object in equilibrium?

a)

Accelerating at a constant rate

b)

At rest

c)

Moving at a constant linear velocity

d)

Falling before reaching its terminal velocity

6.

"Objects at rest stay at rest and objects in motion stay in motion, unless acted upon by a non-zero net force"

a)

Newton's 2nd Law

b)

Newton's 1st Law

c)

Newton's 3rd Law

d)

Einstein's Special Theory of Relativity

7.

What is force measured in?

a)

Meters (m)

b)

Newtons (N)

c)

Ohms (Ω)

d)

ms2\frac{m}{s^2}

8.

How do you find Newtons (N)?

a)

12mv2\frac{1}{2}mv^2

b)

mgh

c)


kg(m)s2\frac{kg\left(m\right)}{s^2}

d)

F∥dt\frac{F_{\parallel}d}{t}

9.

What is the name for the arrows in a Free Body Diagram?

a)

Scalars

b)

Vectors

c)

Arrows

d)

Forces

10.

What is Fnet?

a)

The force of friction

b)

The force opposite to gravity that keeps you from falling through the floor

c)

The force that a net has on an object

d)

The sum of all forces acting on an object

11.

The amount of stuff in an object

a)

Mass

b)

Weight

12.

The effect of gravity on an object

a)

Mass

b)

Weight

13.

What is always true about FN?

a)

It is PERPENDICULAR to the surface

b)

It is a NEGATIVE value

c)

It is PARALLEL to the surface

d)

It is a PULL force

14.

Which is false about Friction?

a)

It is a supporting force

b)

It opposes motion or attempted motion

c)

It points in the direction opposite of motion or attempted motion

d)

It needs 2 surfaces

15.

Which things influence Friction?

a)

The qualities of the two surfaces involved

b)

The amount of Chemical Energy in the objects

c)

The surrounding temperature

d)

The Normal Force

16.

Which is greater: Two objects's Static μ or Kinetic μ?

a)

Static

b)

Kinetic

17.

"The acceleration of an object is directly proportional to the net force on the object and inversely proportional to the mass of the object" OR F=ma

a)

Newton's 3rd Law

b)

Newton's 1st Law

c)

Newton's 2nd Law

d)

Einstein's General Theory of Relativity

18.

What is(are) the equation(s) for the Force of Friction?

a)

Fupμ

b)

ma

c)

FFμ

d)

12mv2\frac{1}{2}mv^2

19.

A resistive force that always opposes the direction of motion.

a)

Normal Force

b)

Air Resistance

c)

Applied Force

d)

Gravity

20.

What is NOT a direct factor of Air Resistance?

a)

Speed

b)

Height/Elevation

c)

Frontal Area

d)

Air Density

21.

What does not happen at Terminal Velocity?

a)

The object becomes weightless

b)

The object stops accelerating

c)

The object's forces of gravity and air resistance cancel out

d)

The object reaches a constant velocity

22.

What would generally reach Terminal Velocity faster?

a)

A dog

b)

A human

23.

If falling from the same height, what would hit the ground faster?

a)

A human

b)

A dog

24.

"If an object exerts a force on a second object, the second object exerts an equal and opposite force on the first."

AKA the "Punch the Wall Law"

a)

Newton's 1st Law

b)

Newton's 2nd Law

c)

Newton's 3rd Law

d)

Einstein's Quantum Theory of Light

25.

If a bug smacks into a car, which experiences a greater force?

a)

The bug

b)

The car

c)

Neither experience any force

d)

They both experience an equal amount of force

26.

If a bug smacks into a car, which has more acceleration?

a)

The bug

b)

The car

c)

Neither experience any acceleration

d)

They accelerate at an equal pace

27.

Jimbob has a mass of 50kg on Earth (assuming earth's gravity is -10m/s2); If he was on a distant planet that has a quarter of the gravity on earth, how much would he weigh?

a)

12.5N

b)

50N

c)

125N

d)

500N

28.

Jimbob has a mass of 100lbs on Earth. If he were to go to the Moon, which has about a sixth of the gravity of earth, what would be his mass?

a)

~750N

b)

100lbs

c)

1000N

d)

45lbs

29.

An elevator is suspended by cables and slowly descends through the elevator shaft. There is no contact with the walls of the elevator shaft. Which forces are being exerted upon the elevator?

a)

Force of Friction

b)

Force of Gravity

c)

Normal Force

d)

Tension

e)

Applied Force

30.

A moving truck skids to a stop from a high speed with its wheels locked. Which forces are being exerted upon the truck?

a)

Force of Friction

b)

Force of Gravity

c)

Normal Force

d)

Air Resistance

e)

Applied Force

31.

A football is moving upward and rightward toward the peak of its trajectory. Ignoring air resistance, Which forces are being exerted upon the football?

a)

Force of Friction

b)

Force of Gravity

c)

Normal Force

d)

Spring Force

e)

Applied Force

32.

An eagle glides through the air along a horizontal path. Which forces are being exerted upon the eagle?

a)

Force of Friction

b)

Force of Gravity

c)

Normal Force

d)

Air Resistance

e)

Applied Force

33.

A big crate is being pushed leftward across the floor at a constant velocity. Ignoring air resistance, which forces are being exerted upon the crate?

a)

Force of Friction

b)

Force of Gravity

c)

Normal Force

d)

Magnetic Force

e)

Applied Force

34.

An object has an acceleration of 18 m/s2; If its mass were tripled, what would its new acceleration be?

a)

18m/s2

b)

9m/s2

c)

6m/s2

d)

48m/s2

35.

An object has an acceleration of 12m/s2. If the net force was doubled, what would its new acceleration be?

a)

24m/s2

b)

6m/s2

c)

4m/s2

d)

12m/s2

36.

An object has an acceleration of 8m/s2. If its mass was halved, what would its new acceleration be?

a)

4m/s2

b)

8m/s2

c)

16m/s2

d)

32m/s2

37.

An object has an acceleration of 8m/s2. If its mass was halved and its net force was doubled, what would its new acceleration be?

a)

2m/s2

b)

32m/s2

c)

8m/s2

d)

16m/s2

38.

A 25kg box is being pushed with 107N of force and accelerates at 0.58m/s2. What is the coefficient of friction between the box and the floor?

(a)  

39.

A 900kg rightward-moving object experiences 4500N of resistance as it skids to a stop. What is its acceleration?

a)

5m/s2

b)

100m/s2

c)

10m/s2

d)

31.67m/s2

40.

A 5kg bucket is being raised by a cable at a constant speed of 1.4m/s. How much tension is it experiencing?

a)

0.7N

b)

7m/s2

c)

50N

d)

70N

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