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PHYSICS

Physics
A body of mass 2 kg is thrown upward with initial velocity of 20 m/s. After 2 seconds, its kinetic energy will be : (g = 10 m/s2)

200 J
400 J
0 J
100 J

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Physics
The energy stored in a watch spring is

Chemical energy
Kinetic energy
Heat energy
Potential energy

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Physics
An object that has kinetic energy must be

At rest
Moving
At an elevated position
Falling

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Physics
A mass of 20 kg is at a height of 8 m above the ground. Then the potential energy possessed by the body is: [Given g = 9.8 m/s2]

1568 N
1568 C
1568 W
1568 J

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Physics
A person lifts luggage of 20 kg from the ground and puts it on his head 2m above the ground. Calculate the work done by him. (g = 10 )

200J
40J
400J
20 J

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