Force Physics Practice

Get the force physics practice you need to get an A. Generate a 10 or 20 question quiz from this unit and find other useful practice.

This is an extensive unit. For more specific force practice, follow this link to a list of unit sections. Each section will have a physics practice quiz at the bottom of the page.

Use our equation sheet for guidance on the force equations. This unit uses one dimensional section, force section, and trigonometry reminders section of the equation sheet.

Physics Equation Sheet

Random 10 Questions from the Force Test Bank

10 - Forces Questions

1 / 10

What is the spring constant of a spring displaced 0.1 meters when 400 N of force is applied?

40 N/m

4000 N/m

384 N/m

10 N/m

2 / 10

What is the acceleration of a 1400 N skydiver at terminal velocity?

0 m/s/s

9.8 m/s/s down

9.8 m/s/s up

No net force and no acceleration at terminal velocity

3 / 10

What is the net force when a 1400 N skydiver encounters 600 N of air resistance?

0 N

800 N down

800 N up

2000 N down

2000 N up

What is the net force when a 1400 N skydiver encounters 600 N of air resistance?

1400 N weight which is a vector directed down and mathematically -1400

600 N air resistance is opposite of motion so up and mathematically is +600

add the vectors together with their signs to get net force

-1400 + 600 = - 800 N or 800 N down

4 / 10

What is the acceleration on a 5 kg object that has a force of 20 N applied to the right and 5 newtons applied to the left?

5 m/s/s right

3 m/s/s left

5 m/s/s left

3 m/s/s right

5 / 10

Which is the term for the molecules that make up an object.

mass

weight

Matter is composed of the atoms/molecules that make up an object

6 / 10

Which changes depending on your location?

mass

weight

Mass (kg) never changes because it is a measure of the matter that you are composed of. You are the same matter on earth or on the moon.

Weight (F_w) changes when g changes. g changes depending on your altitude on earth, in space, or on another planet (it is not always 9.8 m/s²which is why many classes use a more rounded 10 m/s²instead.

(F_w = mg)

7 / 10

Which of Newton's Laws describes an objects resistance to a change in motion or rest?

Newton's First Law

Newton's Second Law

Newton's Third Law

Newtons First Law: Law of inertia

This is about a resistance to change in motion. An object at rest stays at rest and an object in motion stays in motion unless acted upon by an outside force.

8 / 10

You use a spring scale to measure the amount of force required to first start an object moving. You would use this value to determine the coefficient of ___________ friction.

static

kinetic

Coefficient of static friction. The moment the object first starts moving is also almost equivalent to the maximum force provided by friction while the object was at rest or static.

9 / 10

What is the magnitude of net force when 162 N of force is required to keep an object in constant motion?

0 n

10 N

16.2 N

162 N

Constant motion means no acceleration. Net force (sum of overall forces on an object) must be zero if there is no acceleration.

10 / 10

Which letter above represents weight?

Your score is

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Random 20 Questions from the Force Test Bank

20 - Forces Questions

1 / 20

Which direction does an object accelerate?

Always directed up

Always directed down

Always directed the direction of the net force

Acceleration is always in the direction of the net force. If you push a box to the right, with an overall or net force to the right, the object will accelerate to the right.

2 / 20

What is the displacement of a spring that has a spring constant of 2000 N/m when a force of 500N is applied?

0.25 m

1000000 m

2.5 m

4 m

3 / 20

What is the spring constant of a spring displaced 0.1 meters when 400 N of force is applied?

40 N/m

4000 N/m

384 N/m

10 N/m

4 / 20

How much force is in a spring that has a spring constant of 4400 N/m that is displaced 0.03 m?

102 N

65 N

321 N

132 N

5 / 20

How much tension must be in a rope attached above an object if the normal force on a 500 N object is 100 N.

300 N up

200 N up

400 N up

600 N up

6 / 20

What is the acceleration of a 1400 N skydiver at terminal velocity?

0 m/s/s

9.8 m/s/s down

9.8 m/s/s up

No net force and no acceleration at terminal velocity

7 / 20

What is the mass of a 1400 N skydiver when she encounters 600 N of air resistance? (use g = 9.8 m/s/s)

13720 kg

143 kg

61.2 kg

81.6 kg

Find Mass

F_w = mg
m =F_w/g
m = 1400/9.8 = 143 kg

8 / 20

Force and acceleration are ______________ related

directly

inversely

9 / 20

Acceleration and mass are ______________ related

directly

inversely

10 / 20

Joe has a mass of 54 kg. What is his weight on the earth?

529 N

87.5 N

54 N

5.51 N

F_w = mg

m = 54 kg

g = 9.8 m/s²

F_w = (54)(9.8) = 529.2 N

11 / 20

Joe has a mass of 54 kg. What is his weight on the moon where the acceleration due to gravity is 1.62 m/s²?

539 N

87.5 N

54 N

5.51 N

F_w = mg

m = 54 kg

g = 1.62 m/s²

F_w = (54)(1.62) = 87.48 N

12 / 20

Which of Newton's Laws describes an objects resistance to a change in motion or rest?

Newton's First Law

Newton's Second Law

Newton's Third Law

Newtons First Law: Law of inertia

This is about a resistance to change in motion. An object at rest stays at rest and an object in motion stays in motion unless acted upon by an outside force.

13 / 20

How much force is required to keep an object in motion?

0 N

It's Weight

Depends on its mass

Newtons first law states an object in motion will stay in motion and an object at rest will stay at rest. No force is needed. Think of an asteroid in space

14 / 20

Which has more inertia?

0.34 kg ball

40 kg calf

80 kg boy

Mass is directly related to inertia. The more the mass the more the inertia

Force applied equals the magnitude of force of friction in constant motion. If you find the force of friction (F_f), you know the Force applied (F_A)

15 / 20

What is the force required to keep a 0.5 kg brick in constant motion on a wood surface?

0 N

0.45 N

2.2 N

2.9 N

10.9 N

16 / 20

What is the magnitude of net force when 162 N of force is required to keep an object in constant motion?

0 n

10 N

16.2 N

162 N

Constant motion means no acceleration. Net force (sum of overall forces on an object) must be zero if there is no acceleration.

17 / 20

What is the weight of a 4.0 kg object on a 25° frictionless Incline Plane? (Use g = 9.8 m/s²)

0.41 N

4.0 N

9.8 N

39.2 N

18 / 20

What happens to the normal force as the angle of incline increases?

Increases

Decreases

Larger incline means less force into the hill (equal to the magnitude of normal force) as more of the weight is going into the component downhill instead

19 / 20

Which letter above represents normal force?

20 / 20

Which letter above represents the parallel force?

Your score is

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Resources

StickMan Physics Home Page
Force Content Page
Stickman Physics Table of Contents: Use the search bar or click here to easily find a unit or topic
Physics Equation Sheet: commonly used equations, variables, and units
Rule of Ones: analyzing equations to determine how other variables change
Holdensclass.com: Video walk-through of Many Physics Concepts