When a compressed spring is released, it converts its potential energy into-
A. Mechanical energy
B. Wind power
C. Elastic potential energy
D. Kinetic energy
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When an object of 15kg is at a height of 5m from the ground, then how much energy it will contains?
A. 520 J
B. 528 J
C. 725 J
D. 735 J
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Which of the following energy is always positive?
A. Static energy
B. Kinetic energy
C. Potential energy
D. Gravitational energy
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Choose the most appropriate option-
The momentum consists of . . . . . . . .
A. no direction
B. direction
C. magnitude and direction
D. magnitude
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Force = . . . . . . . .
A. mass × acceleration
B. mass × volume
C. mass × pressure
D. mass × velocity
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When the direction of the force applied and the direction of movement of the object is perpendicular to each other.
A. Power exercised
B. No work done
C. Power not exercised
D. Work done
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How would energy be converted while cycling?
A. Potential energy is converted into muscular energy
B. The chemical energy is converted into muscular energy then kinetic energy
C. Chemical energy is converted into mechanical energy
D. Mechanical energy is converted into kinetic energy
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According to which of the following principles does a rocket works in space?
A. Principle of conservation of momentum
B. Principle of conservation of mass
C. Principle of conservation of energy
D. Principle of conservation of speed
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In which of the following work is not done-
A. A wind mill raising the water from well
B. A donkey put a weight on his back
C. Suman is swimming in a pool
D. A engine is pulling a train
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A uniform chain of length 2m is kept on a table such that a length of 60cm hangs freely from the edge of the table. The total mass of the chain is 4kg. What is the work done in pulling the entire chain on the table?
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The energy contained in an object due to the change in position and shape is called.
A. Kinetic energy
B. Chemical energy
C. Nuclear energy
D. Potential energy
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When an object of 10kg is placed at a height of 7m from the ground, how much energy it will contained-
A. 528 J
B. 686J
C. 520J
D. 588J
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The work done, to increase speed 5 m/s to 10 m/s by a car of 800kg is . . . . . . . .
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An object of 5 kg is raised to a height of 4 m. What will be the value of the work done due to the force of gravity on that object?
(g = 10m/s2 )
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Name the physical quantity that is equal to the product of force and velocity.
A. Work
B. Energy
C. Power
D. Acceleration
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Force is the product of
A. Mass and velocity
B. Mass and acceleration
C. Weight and velocity
D. Weight and acceleration
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Which of the following is never alone in nature?
A. inertia
B. force
C. momentum
D. velocity
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Force between two bodies, always . . . . . . . .
A. Used in the same and opposite directions
B. Used in same direction
C. Used in uneven and opposite directions
D. Are separate forces
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How many watts are there in metric horse power?
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If a girl with a weight of 40 N, climbs on the rope for 20 seconds with the power of 160 watts, then at which height will she reach?
A. 80 meter
B. 4 meter
C. 8 meter
D. 0.8 meter
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