For what angle between F and d work reduces to half of its maximum value?
Correct answer: A. 60°
- A. 60°
- B. 30°
- C. 45°
- D. 90°
Explanation
Solution:- W=Fxdcosθ W=Fxdcos(60°) W=1/2 Fxd
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
Which of the following is unit of P.E:
The power of a pump which can pump 100 kg of water to a height of 100 m in 5 sec is:
A block of mass M is hanging over a smooth and light pulley through a light string. The other end of the string is pulled by a constant force F. The kinetic energy of the block increases by 20J in 1s. Which of the following statements is correct?
1 horse power is equal to:
Which one of the following is bigger unit of work?
A force of 10 N acts on the body and body moves 10 m distance perpendicular to it. Work done by the force on the body is: