PHYS 165 Module 2 | Physics Exam Q&A | Portage
Learning
These are 100 original multiple-choice practice questions for PHYS 165 Module 2.
Since exact module content varies by institution, this set assumes Module 2 covers
work, energy, power, momentum, impulse, collisions, circular motion, and
gravitation. They are not official examination questions and are not copied from any
textbook, test bank, or copyrighted source.
Question 1:
Work is defined as:
A. Force times distance
B. Force times displacement times the cosine of the angle between them
C. Mass times acceleration
D. Force divided by time
Correct answer: B
Rationale:
W = Fd cosθ, where θ is the angle between force and displacement.
Question 2:
The SI unit of work is the:
A. Newton
B. Watt
C. Joule
D. Pascal
Correct answer: C
Rationale:
Work is measured in joules (J), where 1 J = 1 N·m.
Question 3:
A force of 10 N pushes an object 5 m in the direction of the force. The work done is:
A. 2 J
B. 15 J
,C. 50 J
D. 500 J
Correct answer: C
Rationale:
W = Fd cosθ = (10)(5)(cos0°) = 50 J.
Question 4:
A force is applied perpendicular to the direction of motion. The work done by that force
is:
A. Maximum
B. Zero
C. Negative
D. Equal to Fd
Correct answer: B
Rationale:
W = Fd cos90° = 0, since cos90° = 0.
Question 5:
Work is negative when:
A. Force and displacement are in the same direction
B. Force and displacement are perpendicular
C. Force and displacement are in opposite directions
D. Force is zero
Correct answer: C
Rationale:
When force opposes displacement, θ = 180° and cosθ = −1, giving negative work.
Question 6:
A box is carried horizontally at constant speed. The work done by gravity is:
A. Positive
B. Negative
C. Zero
D. Equal to mgh
,Correct answer: C
Rationale:
Gravity acts vertically while displacement is horizontal, so W = 0.
Question 7:
Kinetic energy is given by:
A. mgh
B. ½mv²
C. mv
D. ½mv
Correct answer: B
Rationale:
KE = ½mv².
Question 8:
A 2 kg object moves at 4 m/s. Its kinetic energy is:
A. 4 J
B. 8 J
C. 16 J
D. 32 J
Correct answer: C
Rationale:
KE = ½(2)(4²) = 16 J.
Question 9:
If the speed of an object doubles, its kinetic energy:
A. Doubles
B. Halves
C. Quadruples
D. Stays the same
Correct answer: C
Rationale:
KE ∝ v², so doubling v gives 4× kinetic energy.
, Question 10:
Gravitational potential energy near Earth’s surface is:
A. ½mv²
B. mgh
C. mv
D. ½kx²
Correct answer: B
Rationale:
PE = mgh near Earth’s surface.
Question 11:
A 5 kg object is lifted 3 m. Its increase in potential energy is about:
A. 15 J
B. 49 J
C. 147 J
D. 294 J
Correct answer: C
Rationale:
ΔPE = mgh = (5)(9.8)(3) = 147 J.
Question 12:
Elastic potential energy in a spring is:
A. mgh
B. ½mv²
C. ½kx²
D. kx
Correct answer: C
Rationale:
Spring potential energy is PE = ½kx².
Question 13:
A spring with k = 200 N/m is stretched 0.1 m. Its potential energy is:
Learning
These are 100 original multiple-choice practice questions for PHYS 165 Module 2.
Since exact module content varies by institution, this set assumes Module 2 covers
work, energy, power, momentum, impulse, collisions, circular motion, and
gravitation. They are not official examination questions and are not copied from any
textbook, test bank, or copyrighted source.
Question 1:
Work is defined as:
A. Force times distance
B. Force times displacement times the cosine of the angle between them
C. Mass times acceleration
D. Force divided by time
Correct answer: B
Rationale:
W = Fd cosθ, where θ is the angle between force and displacement.
Question 2:
The SI unit of work is the:
A. Newton
B. Watt
C. Joule
D. Pascal
Correct answer: C
Rationale:
Work is measured in joules (J), where 1 J = 1 N·m.
Question 3:
A force of 10 N pushes an object 5 m in the direction of the force. The work done is:
A. 2 J
B. 15 J
,C. 50 J
D. 500 J
Correct answer: C
Rationale:
W = Fd cosθ = (10)(5)(cos0°) = 50 J.
Question 4:
A force is applied perpendicular to the direction of motion. The work done by that force
is:
A. Maximum
B. Zero
C. Negative
D. Equal to Fd
Correct answer: B
Rationale:
W = Fd cos90° = 0, since cos90° = 0.
Question 5:
Work is negative when:
A. Force and displacement are in the same direction
B. Force and displacement are perpendicular
C. Force and displacement are in opposite directions
D. Force is zero
Correct answer: C
Rationale:
When force opposes displacement, θ = 180° and cosθ = −1, giving negative work.
Question 6:
A box is carried horizontally at constant speed. The work done by gravity is:
A. Positive
B. Negative
C. Zero
D. Equal to mgh
,Correct answer: C
Rationale:
Gravity acts vertically while displacement is horizontal, so W = 0.
Question 7:
Kinetic energy is given by:
A. mgh
B. ½mv²
C. mv
D. ½mv
Correct answer: B
Rationale:
KE = ½mv².
Question 8:
A 2 kg object moves at 4 m/s. Its kinetic energy is:
A. 4 J
B. 8 J
C. 16 J
D. 32 J
Correct answer: C
Rationale:
KE = ½(2)(4²) = 16 J.
Question 9:
If the speed of an object doubles, its kinetic energy:
A. Doubles
B. Halves
C. Quadruples
D. Stays the same
Correct answer: C
Rationale:
KE ∝ v², so doubling v gives 4× kinetic energy.
, Question 10:
Gravitational potential energy near Earth’s surface is:
A. ½mv²
B. mgh
C. mv
D. ½kx²
Correct answer: B
Rationale:
PE = mgh near Earth’s surface.
Question 11:
A 5 kg object is lifted 3 m. Its increase in potential energy is about:
A. 15 J
B. 49 J
C. 147 J
D. 294 J
Correct answer: C
Rationale:
ΔPE = mgh = (5)(9.8)(3) = 147 J.
Question 12:
Elastic potential energy in a spring is:
A. mgh
B. ½mv²
C. ½kx²
D. kx
Correct answer: C
Rationale:
Spring potential energy is PE = ½kx².
Question 13:
A spring with k = 200 N/m is stretched 0.1 m. Its potential energy is:
