NEET Questions on Work Power Energy. We covered all the NEET Questions on Work Power Energy in this post for free so that you can practice well for the exam.
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MCQ on Work Power and Energy for NEET Students
What is the sign of the work performed on an object in uniform circular motion?
(a) Zero
(b) Positive
(c) Negative
(d) Depends on the particular situation
Option a – Zero
A constant force of 10 N causes a box to move at a constant speed of 2 m/s. How much work is done in 10 seconds?
(a) 200 J
(b) 50 J
(c) 10 J
(d) 2 J
Option a – 200 J
An object of 2 kg is moving with a velocity of 5 m/s. If its velocity is doubled, the kinetic energy will become
(a) 100 J
(b) 25 J
(c) 200 J
(d) 2.5 J
Option b – 25 J
A mass is kept stationary by an external force. All of the following are true except
(a) the point of application of the force does not move
(b) no work is done on the mass
(c) there is no net force on the mass
(d) the external force may perform work on the mass
The sum of the change in kinetic and potential energy y is always
(a) zero
(b) positive
(c) negative
(d) None of the above
Option a – zero
A man of a mass of 80 kg runs up a staircase in 12 seconds. Another man B of mass 60 kg runs up the same staircase in 11 seconds. The ratio of powers of A and B is
(a) 11:12
(b) 11: 9
(c) 12:11
(d) 9:11
Option b – 11: 9
A lorry and a car moving with the same K.E. are brought to rest by applying the same retarding force, then
(a) the lorry will come to rest at a shorter distance
(b) the car will come to rest at a shorter distance
(c) both come to rest at the same distance
(d) None of the above
Option c – both come to rest at the same distance
A weight-lifter lifts 200 kg from the ground to a height of 2 meters in 9 seconds. The average power generated by the man is
(a) 15680 W
(b) 3920 W
(c) 1960 W
(d) 980 W
Option d – 980 W
The gravitational potential energy of an object will
(a) increase by increasing the path along which the object is moved
(b) decrease by increasing the path along which the object is moved
(c) not affected by changing the path, provided the overall height is the same
(d) None of these
Option c – not affected by changing the path, provided the overall height is the same
A block of weight W has pulled a distance & along a horizontal table. The work done by the weight is
(a) Wl
(b) 0
(c) Wgl
(d) Wl/g
Option b – 0
The unit of energy is
(a) same as the unit of work
(b) joule
(c) Both (a) and (b)
(d) Neither (a) nor (b)
Option c – Both (a) and (b)
The proper care and maintenance of machines require
(a) to make them good looking
(b) preserving them for the future.
(c) for their efficient and longer use
(d) None of these
Option c – for their efficient and longer use
Solar cookers are used
(a) to cook our food
(b) in artificial satellites
(c) to convert into electrical energy
(d) in drying clothes and other materials
Option a – to cook our food
What is the sign of the work done by gravity on a man standing on a platform?
(a) Zero
(b) Positive
(c) Negative
(d) Depends on the particular situation
Option a – Zero
A body at rest can have
(a) speed
(b) energy
(c) momentum
(d) velocity
Option b – energy
An electrical appliance of 500 W is used for 5 hours per day. Energy consumed in 30 days will be
(a) 2.5 kW h
(b) 25 kW h
(c) 75 kW h
(d) None of these
Option c – 75 kW h
When a freely falling object hits the ground, its kinetic energy is
(a) Converted into heat energy
(b) Used to form a crater in the ground
(c) Collides and then rebounds
(d) Any of the three is possible
Option c – Collides and then rebounds
A man pushes a wall and fails to displace it. he does
(a) negative work
(b) positive but not maximum work
(c) no work at all
(d) Maximum work
Option c – no work at all
If the force and displacement of the particle in direction of force are doubled. Work would be
(a) double
(b) four-time
(c) half
(d) 1/4 times
Option b – four-time
Which of the following force(s) is/are non-conservative?
(a) Frictional force
(b) Spring force
(c) Elastic force
(d) All of these
Option a – Frictional force
The energy stored in the wounded spring watch is
(a) K.E.
(b) P.E.
(d) chemical energy
Option b – P.E.
The rate of doing work is termed as
(a) force
(b) mechanical energy
(c) power
(d) momentum
Option c – power
We covered all the neet questions on work power energy above in this post for free so that you can practice well for the exam.
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