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843 questions total
Science Work and Energy
What are the various energy transformations that occur when you are riding a bicycle?
41 186
Science Work and Energy
The potential energy of a freely falling object decreases progressively. Does this violate the law of conservation of energy? Why?
38 138
Science Work and Energy
A mass of 10 kg is at a point A on a table. It is moved to a point B. If the line joining A and B is horizontal, what is the work…
30 140
Science Work and Energy
Certain force acting on a 20 kg mass changes its velocity from 5 m/s to 2 m/s. Calculate the work done by the force.
34 138
Science Work and Energy
A battery lights a bulb. Describe the energy changes involved in the process
33 139
Science Work and Energy
An object is thrown at an angle to the ground. It moves in a curved path and falls back to the ground. The starting and ending po…
53 180
Science Work and Energy
A lamp consumes 1000 J of electrical energy in 10 s. What is its power?
31 121
Science Work and Energy
Define 1 watt of power.
32 116
Science Work and Energy
What is power?
34 131
Science Work and Energy
The kinetic energy of an object of mass m moving with a velocity of 5 m/s is 25 J. What will be its kinetic energy when its velo…
35 135
Science Work and Energy
Write an expression for the kinetic energy of an object.
33 84
Science Work and Energy
What is the kinetic energy of an object?
33 95