The amount of work done is pumping water out of a cubicle vessel of height 1 m is: (g= 10 m/s2)
Correct answer: C. 10,000 J
- A. 1000 J
- B. 5000 J
- C. 10,000 J
- D. 100 J
Explanation
ρ = m/V → m=ρV = (1000)(1x1x1) = 1000 kg W = P.E. = mgh = (1000)(10)(1) = 10000 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 and Energy
Work transfers energy when a force causes displacement, while kinetic energy, gravitational potential energy and power describe motion, position and the rate of energy transfer. The work-energy theorem links net work with change in kinetic energy, and efficiency accounts for energy losses rather than treating them as energy destruction.
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 and Energy questions
A 2 kg block is thrown upward from a point 20m above Earth's surface. At what height above Earth's surface will the gravitational potential energy of the Earth-block system have increased by 500 J? (g = 10 m/s2)
Which is the biggest unit of energy:
Kilowatt hour is the unit of:
A crane can raise a body of mass 100 kg vertically upward with a speed of 5 m/s. The power of its engine is (g= 10 m/s2):
A 50 kg body is accelerated from rest to 20 m/s in 10s. What is the amount of work done?
A ball, starting at point X, rolls down the hill shown in the diagram. At which point does the ball have half of its maximum kinetic energy? (Ignore friction)