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WorksheetsPhysics Work and Energy
Total questions: 10
Worksheet time: 5mins
A man of mass 50 kg jumps to a height of 1 m. His potential energy at the highest point is(g = 10 m/s2)
(a) 500 J
(b) 50 J
(c) 5 J
(d) 5000 J
The work done on an object does not depend upon the __________.
(a) Force applied
b)Displacement
(c) Initial velocity of the object
(d) none
In case of negative work the angle between the force and displacement is ______.
(a) 0°
(b) 45°
(c) 90°
(d) 180°
Water stored in a dam possesses __________ energy.
(a) electrical
(b) no
(c) potential
(d) kinetic
Which one of the following is not the unit of work?
(a) Joule
(b) Newton metre
(c) Watt
(d) None
The number of joules contained in 1 kWh is
(a) 36 × 105 J
(b) 3.6 × 107 J
(c) 36 × 108 J
(d) 3.7 × 107 J
Work done by friction ____________ of the body.
(a) increases kinetic energy
(b) decreases kinetic energy
(c) increases potential energy
(d) decreases potential energy
One joule work is said to be done when _______________________.
(a) a force of 1 N displaces a body by 1 cm
(b) a force of 1 N displaces a body by 1 m
(c) a force of 1 dyne displaces a body by 1 m
(d) a force of 1 dyne displaces a body by 1 cm
SI unit of power is _______.
(a) watt
(b) joule
(c) newton
(d) metre
Potential energy of a body depends on its ________.
(a) position
(b) configuration
(c) position and configuration
(d) mass and velocity
