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BidishaKashayap1333
@bidishakashayap1333
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Joined: Oct 11, 2021
Last seen: Jul 27, 2023
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Topics: 2174 / Replies: 0
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Topic
Define the term ‘energy’ of a body. What is the SI unit of energy. (b) What are the various forms of energy? (c) Two bodies having equal masses are moving with uniform speeds of v and 2v respectively.
4 years ago
Forum
Work, Power And Energy
Replies: 0
Views: 264
Topic
What happens to the work done when the displacement of a body is at right angles to the direction of force acting on it? Explain your answer. (b) A force of 50N acts on a body and moves it a distance of 4m on a horizontal surface.
4 years ago
Forum
Work, Power And Energy
Replies: 0
Views: 109
Topic
When do we say that work is done? Write the formula for the work done by a body in moving up against gravity. Give the meaning of each symbol which occurs in it. (b) How much work is done when a force of 2N moves a body through a distance of 10cm in...
4 years ago
Forum
Work, Power And Energy
Replies: 0
Views: 99
Topic
Define the term ‘work’. Write the formula for the work done on a body when a force acts on the body in the direction of its displacement. Give the meaning of each symbol which occurs in the formula.
4 years ago
Forum
Work, Power And Energy
Replies: 0
Views: 101
Topic
A weightlifter is lifting weights of mass 200kg up to a height of 2 meters. If g = 9.8 m/s^2, calculate: (a) potential energy acquired by the weight (b) work done by the weightlifter
4 years ago
Forum
Work, Power And Energy
Replies: 0
Views: 121
Topic
What type of energy is possessed: (a) by the stretched rubber strings of a catapult? (b) by the piece of stone which is thrown away on releasing the stretched rubber strings of catapult?
4 years ago
Forum
Work, Power And Energy
Replies: 0
Views: 285
Topic
A boy weighing 40 kg makes a high jump of 1.5m (a) What is his kinetic energy at the highest point? (b) What is his potential energy at the highest point?
4 years ago
Forum
Work, Power And Energy
Replies: 0
Views: 103
Topic
If the work done by a force in moving an object through a distance of 20 cm is 24.2J, what is the magnitude of the force?
4 years ago
Forum
Work, Power And Energy
Replies: 0
Views: 195
Topic
How much is the mass of a man if he has to do 2500 joules of work in climbing a tree 5m tall?
4 years ago
Forum
Work, Power And Energy
Replies: 0
Views: 202
Topic
Give two examples where a body possesses both kinetic energy as well as potential energy.
4 years ago
Forum
Work, Power And Energy
Replies: 0
Views: 199
Topic
On what factors does the gravitational potential energy of a body depend? (b) Give one example each of a body possesses both, (i) kinetic energy (ii) potential energy
4 years ago
Forum
Work, Power And Energy
Replies: 0
Views: 99
Topic
Explain by an example that a body may possess energy even when it is not in motion.
4 years ago
Forum
Work, Power And Energy
Replies: 0
Views: 223
Topic
A car is being driven by a force of 2.5 x 10^10 N. Travelling at a constant speed of 5 m/s, it takes 2 minutes to reach a certain place. Calculate the work done.
4 years ago
Forum
Work, Power And Energy
Replies: 0
Views: 116
Topic
How much work is done when a force of 1 N moves a body through a distance of 1m in its own direction?
4 years ago
Forum
Work, Power And Energy
Replies: 0
Views: 270
Topic
A body of mass 2kg is thrown vertically upwards with an initial velocity of 20 m/s. What will be its potential energy at the end of 2s?
4 years ago
Forum
Work, Power And Energy
Replies: 0
Views: 226
Topic
To what height should a box of mass 150 kg be lifted, so that its potential energy may become 7350 joules?
4 years ago
Forum
Work, Power And Energy
Replies: 0
Views: 88
Topic
When is the work done by a force on a body: (a) positive (b) negative (c) zero
4 years ago
Forum
Work, Power And Energy
Replies: 0
Views: 87
Topic
A boy weighing 50 kg climbs up a vertical height of 100m. Calculate the amount of work done by him. How much potential energy does he gain?
4 years ago
Forum
Work, Power And Energy
Replies: 0
Views: 259
Topic
A body of mass 100kg is lifted up by 10m. Find: (a) the amount of work done (b) potential energy of the body at that height
4 years ago
Forum
Work, Power And Energy
Replies: 0
Views: 280
Topic
Calculate the work done by the brakes of a car of mass 1000 kg when its speed is reduced from 20 m/s to 10 m/s.
4 years ago
Forum
Work, Power And Energy
Replies: 0
Views: 242
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