An object of mass 5 kg is lifted to a height of 4 m. What is the work done against gravity? (g = 10 m/s²)
Correct answer: C. 200 J
- A. 100 J
- B. 150 J
- C. 200 J
- D. 250 J
Explanation
This is correct because work done = mgh = 5 × 10 × 4 = 200 J.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Work
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.
Practise Work and Energy
748 free Work and Energy MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Work questions
The work done during expansion of a gas is independent of pressure if the expansion takes place
The given figure shows a cylinder containing fluid with a movable piston. If the piston moves out a small distance ∆x, then the work done by the gas is
A group of migrating birds are flying in the sky. If they experience wind in the same direction of their motion, then the work done by the wind on birds will be
A force of 10 N moves an object 5 m in the direction of the force. What is the work done?
What is the work done when the angle between force and displacement is 90°?
Which of the following does not have units of energy?