Free Work and Energy MCQs with Answers

• A. Change in total energy
• B. Change in kinetic energy
• C. Change in power
• D. None of these options are correct

Explanation: The work-energy theorem states that the net work done by the forces on an object equals the change in its kinetic energy.

• A. 40 J
• B. 30 J
• C. 50 J
• D. 20 J
• E. 10 J

Explanation: The explanation for this question will be added soon.

• A. 50 units
• B. 75 units
• C. 125 units
• D. 155 units
• E. 200 units

Explanation: The explanation for this question will be added soon.

• A. The body moves parallel to F
• B. The body move opposite to F
• C. The body right angle to F
• D. Centripetal and centrifugal balance each other

Explanation: Option C is correct since the motion of the body moving in a circular path and the centripetal force act perpendicularly as shown in the…

• A. 0.5 J
• B. 1 J
• C. 2 J
• D. 1.5 J

Explanation: When y = 0, F = 1 N. When y = 1, F = 2 N. Therefore the average value of F = (1 + 2)/2 = 1.5 N.

• A. Positive
• B. Negative
• C. Can be positive or negative
• D. None of these options are correct

Explanation: If a system is gaining energy / transfer of energy to the system occurs, then the work done on the system is said to be positive.

• A. The body moves parallel to F
• B. The body moves opposite to F
• C. The body moves at right angle to F
• D. Centripetal and centrifugal balance each other

Explanation: For work to be done by a force, an object must move in the direction of the force.

• A. 5 J
• B. Zero
• C. 31.42 J
• D. 500 J

Explanation: No work is done on objects moving in circular motion. The reason for this is that the direction of motion of the body is perpendicular to…

• A. Displacement
• B. Power
• C. Work
• D. Acceleration

Explanation: Area under any graph is the product of quantities on each axis. Since the product of Force and Displacement is work, option C is the…

• A. 250J
• B. 25J
• C. 2500J
• D. 25,000J

Explanation: Potential energy = Mgh Mg (weight) is given as 10N So, 250x10=2500.

• 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.

• 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.

• 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…

• 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.

• 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.

• 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…

• A. Power
• B. Impulse
• C. Force
• D. Work

Explanation: The area under a force-displacement curve provides information about 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…

• 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…

• 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.