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(b) by the piece of stone which is thrown away on releasing the stretched rubber strings of catapult? 4 years ago BidishaKashayap1333 class 9 work power energy lakhmir singh 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 BidishaKashayap1333 class 9 work power energy lakhmir singh 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 BidishaKashayap1333 class 9 work power energy lakhmir singh 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 BidishaKashayap1333 class 9 work power energy lakhmir singh Give two examples where a body possesses both kinetic energy as well as potential energy. 4 years ago BidishaKashayap1333 class 9 work power energy lakhmir singh 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 BidishaKashayap1333 class 9 work power energy lakhmir singh Explain by an example that a body may possess energy even when it is not in motion. 4 years ago BidishaKashayap1333 class 9 work power energy lakhmir singh 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 BidishaKashayap1333 class 9 work power energy lakhmir singh 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 BidishaKashayap1333 class 9 work power energy lakhmir singh 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 BidishaKashayap1333 class 9 work power energy lakhmir singh To what height should a box of mass 150 kg be lifted, so that its potential energy may become 7350 joules? 4 years ago BidishaKashayap1333 class 9 work power energy lakhmir singh When is the work done by a force on a body: (a) positive (b) negative (c) zero 4 years ago BidishaKashayap1333 class 9 work power energy lakhmir singh 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 BidishaKashayap1333 class 9 work power energy lakhmir singh 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 BidishaKashayap1333 class 9 work power energy lakhmir singh 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 BidishaKashayap1333 class 9 work power energy lakhmir singh A man drops a 10 kg rock from the top of a 5m ladder. What is its speed just before it hits the ground? What is its kinetic energy when it reaches the ground? 4 years ago BidishaKashayap1333 class 9 work power energy lakhmir singh On a level road, a scooterist applies brakes to slow down from a speed of 10 m/s to 5 m/s. If the mass of the scooterist and the scooter be 150kg, calculate the work done by the brakes. 4 years ago BidishaKashayap1333 class 9 work power energy lakhmir singh A body of 2 kg falls from rest. What will be its kinetic energy during the fall at the end of 2s? 4 years ago BidishaKashayap1333 class 9 work power energy lakhmir singh Two objects having equal masses are moving with uniform velocities of 2 m/s and 6 m/s respectively. Calculate the ratio of their kinetic energies. 4 years ago BidishaKashayap1333 class 9 work power energy lakhmir singh Find the momentum of a body of mass 100g having a kinetic energy of 20J. 4 years ago BidishaKashayap1333 class 9 work power energy lakhmir singh Page 2 / 5 Prev 1 2 3 4 5 Next Share: Super Globals Requests: Server: Options and Features route: community use_home_url: url: https://eanshub.com/community/ pageid:187 default_groupid: 3 2022 How Can We Help? Δ Home About Us Contact Us Privacy Policy Term of Use Copyright © 2020 Eanshub All Rights Reserved
