Free Work MCQs with Answers
169 Work MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Work is done when a force produces displacement, with its value determined by the component of force along the displacement. The topic covers positive, negative and zero work, work by variable forces from force-displacement graphs, and the connection between net work and change in kinetic energy.
Last updated
169 questions · page 5 of 9
- A. Displacement
- B. Power
- C. Acceleration
- D. Work
Explanation: The area under a force-displacement graph represents the work done by the force on an object.
Correct answer: Work- A. Negative work
- B. Positive work but not maximum
- C. No work at all
- D. Maximum work
Explanation: Option A: Negative work occurs when the force applied to an object is in the opposite direction of the displacement.
Correct answer: No work at all- A. 45 degrees
- B. 90 degrees
- C. 0 degree
- D. 180 degrees
Explanation: The work done is maximum when the angle between the force applied and the displacement is 0 degrees (parallel).Therefore, the correct…
Correct answer: 0 degree- A. 50 J
- B. 20 J
- C. 22 J
- D. 10 J
Explanation: Work, if found by the force applied in the direction of movement, times the distance moved, so 10N x 2m = 20J.
Correct answer: 20 J- A. 0 J
- B. 10 J
- C. 45 J
- D. 20 J
Explanation: Work is equal to the force in the direction of movement (or specified) times the distance moved.
Correct answer: 20 J- A. 2000 J
- B. -2000 J
- C. 0 J
- D. 200 J
Explanation: The work done by the cyclist on the road can be calculated using the formula: Work = Force × Distance × cos(θ), where θ is the angle…
Correct answer: -2000 J- A. Power
- B. Impulse
- C. Force
- D. Work
Explanation: The area under a force-displacement curve provides information about work.
Correct answer: Work- A. 500 J
- B. 1000 J
- C. 5 J
- D. 5000 J
Explanation: To determine the minimum work done in taking water out of the cubic vessel, we need to calculate the loss of gravitational potential…
Correct answer: 5000 J- A. Torque
- B. Momentum
- C. Power
- D. Angular momentum
Explanation: Work and torque have the same dimensions, but they represent different physical quantities: work is related to the energy transferred to…
Correct answer: Torque- A. 2000J
- B. -2000J
- C. 0J
- D. 200J
Explanation: Work is defined as the product of force and displacement in the direction of the force.
Correct answer: -2000J- A. Zero
- B. Minimum
- C. Infinity
- D. Maximum
Explanation: Work done is the dot product of force and displacement. Hence, W = FscosθWhere s is the displacement.Since, θ = 0°As force is parallel to…
Correct answer: Maximum- A. 100 J
- B. -100 J
- C. 0
- D. 50 J
Explanation: m=2kg v=5m/s r=2m Fc= mv2/r eq (1) Fc =(2)(52) / 2 =50/2 =25N Work done= W= F.d eq (2) Displacement in semi circle arc=2r=2 (2) =4m.
Correct answer: 100 J- A. 250 J
- B. 50 J
- C. -250 J
- D. 125 J
Explanation: The energy stored in the spring is given by? E = 1/2 kx2. E = ½ (10)(5)2 . E = "125J".
Correct answer: 125 J- A. 25 J
- B. -75 J
- C. 75 J
- D. 50 J
Explanation: Given that; F1 = 5 N. F2 = 15 N. Displacement = 5 m. The work done by that force is the Force x Displacement in the direction of the…
Correct answer: 75 J- A. 4 J
- B. 8 J
- C. 2 J
- D. 12 J
Explanation: The work done by force can be calculated by: Force x Displacement in the direction of the force (F x d).
Correct answer: 4 J96. Work is a:
- A. Vector quantity
- B. Scalar quantity
- C. Sometimes scalar, sometimes vector
- D. None of these options is correct
Explanation: Work is a scalar quantity. It's a measure of the energy transferred when a force acts on an object, causing it to move a certain distance.
Correct answer: Scalar quantity- A. Electric field
- B. Conservative field
- C. Magnetic field
- D. None of these options is correct
Explanation: work done by a conservative force on a "closed path" is zero; that is, the work done by a conservative force on an object is zero if the…
Correct answer: Conservative field- A. 100 J
- B. 50 J
- C. -100 J
- D. -50 J
Explanation: F= 10 NS= 20 m Theta Θ = 60 degreesWork done W = FS cos theta W= [10][20][cos 60°]W= 200 *½ as cos 60°= ½ or 0.5 W= 100 J
Correct answer: 100 J- A. Friction
- B. Electric
- C. Magnetic
- D. Gravitational
Explanation: A conservative force is a force applied in moving a particle from one point to another, such that the net amount of force is independent…
Correct answer: Friction- A. 15 J
- B. 9 J
- C. 8 J
- D. 18 J
Explanation: Work done= force x distance(i-2j-3k)(2i-5j+k) multiply the coefficients of i then j then k and add them.
Correct answer: 9 J