Here we will provide you the 50+ MCQ Questions of Work, Energy and Power for NEET-UG. Work, Energy and Power is the chapter 6 in Class XI or Class 11 Physics NCERT Unit Work, Energy and Power NEET (conducted by NTA) is based on the NCERT book.
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These 50+ MCQ questions are selected by the experts of studyrate.in and these are more difficult questions, which will help you to better understand Work, Energy and Power NEET MCQ Questions with Answers.
Work, Energy and Power NEET MCQ
A body of mass m is thrown vertically upwards from the ground with an initial velocity u. At the highest point, its velocity will be:
a) u/2
b) zero
c) u
d) 2u
A bullet of mass m is fired from a rifle with an initial velocity v. If the rifle recoils with a velocity V, then the ratio of the kinetic energy of the bullet to that of the rifle is:
a) mv/(m+M)V
b) mv/V
c) (m+M)V/mv
d) (m+M)mv/V
A car of mass 1000 kg is moving with a velocity of 20 m/s. If the engine of the car can provide a constant power of 50 kW, then the car will attain a velocity of 40 m/s in:
a) 10 seconds
b) 20 seconds
c) 40 seconds
d) 80 seconds
A body of mass m is dropped from a height h. It strikes the ground and rebounds to a height of h/2. The work done by the gravitational force during the motion of the body is:
a) 3mgh/2
b) mgh
c) mgh/2
d) 2mgh
A ball is thrown vertically upwards from the ground with an initial velocity u. The time taken by the ball to reach the maximum height is:
a) 2u/g
b) u/g
c) u/2g
d) √(2u/g)
A body of mass m is projected vertically upwards with a velocity u. If R is the maximum height reached by the body, then the work done by the gravitational force during the ascent is:
a) mgh
b) 2mgh
c) mgu/2
d) zero
A ball of mass m is dropped from a height h. At the same time, another ball of mass 2m is thrown vertically upwards from the ground with an initial velocity u. The two balls will meet each other at a height of:
a) h/3
b) h/2
c) 2h/3
d) h
A bullet of mass m is fired with a velocity v at a target of mass M. The target is free to move and recoils with a velocity V. The kinetic energy of the bullet just before hitting the target is:
a) 1/2 mv^2
b) 1/2 Mv^2
c) mv^2
d) Mv^2
A body of mass m is sliding down a frictionless inclined plane of height h and length l. The work done by the gravitational force during the motion of the body is:
a) mgh
b) 2mgh
c) mgl
d) zero
A machine gun fires 120 bullets per minute, each of mass 20 g with a velocity of 600 m/s. If the recoil velocity of the gun is 10 m/s, then the power of the gun is:
a) 30 kW
b) 60 kW
c) 120 kW
d) 240 kW
A car of mass 1200 kg moves with a speed of 20 m/s. It is brought to rest by applying brakes over a distance of 20 m. The work done by frictional force is:
a) 240 kJ
b) 120 kJ
c) 60 kJ
d) 30 kJ
A body of mass 5 kg is thrown vertically upwards with an initial velocity of 10 m/s. If the maximum height reached by the body is 50 m, the work done against air resistance is:
a) 245 J
b) 490 J
c) 735 J
d) 980 J
A body of mass m is thrown upwards with a velocity u. The ratio of the work done by the gravitational force during the upward motion to that during the downward motion is:
a) 1 : 1
b) 1 : 2
c) 2 : 1
d) 4 : 1
A body of mass m is projected with a velocity u at an angle θ to the horizontal. The work done by gravity during the motion of the body is maximum when θ is:
a) 0°
b) 30°
c) 45°
d) 60°
A ball of mass m is thrown with a velocity v at an angle of 60° to the horizontal. If the ball strikes the ground after 2 seconds, the maximum height reached by the ball is:
a) v^2/10
b) v^2/20
c) v^2/40
d) v^2/80
A machine gun fires 10 bullets per second, each of mass 50 g with a velocity of 800 m/s. If the recoil velocity of the gun is 1 m/s, the power of the gun is:
a) 40 kW
b) 80 kW
c) 120 kW
d) 160 kW
A block of mass m is projected with a velocity u on a rough horizontal surface. The coefficient of kinetic friction between the block and the surface is μ. The distance traveled by the block before coming to rest is:
a) u^2/2gμ
b) u^2/gμ
c) u^2/2μg
d) u^2/μg
A body of mass m is thrown upwards with a velocity u. The work done by the gravitational force during the entire motion of the body is:
a) mgu/2
b) mgu
c) 2mgu
d) zero
A body of mass m is projected with a velocity u at an angle θ to the horizontal. The ratio of the maximum height reached by the body to the horizontal range is:
a) sin^2θ
b) cos^2θ
c) tan^2θ
d) cot^2θ
A block of mass m is placed on an inclined plane of angle θ with the horizontal. The coefficient of static friction between the block and the plane is μ. The maximum force that can be applied horizontally to the block without it slipping is:
a) mgμcosθ
b) mgμsinθ
c) mgcosθ/μ
d) mgsinθ/μ
A body of mass m is lifted vertically upwards by applying a force F. If the body is lifted to a height h, the work done by the force F is:
a) Fh
b) Fh/m
c) Fh/g
d) Fgh
A bullet of mass m moving with a velocity v strikes a block of mass M at rest. If the coefficient of restitution between the bullet and the block is e, the loss of kinetic energy in the collision is:
a) (1-e^2)mv^2/(M+m)
b) (1-e^2)Mv^2/(M+m)
c) (1-e^2)mv^2/M
d) (1-e^2)Mv^2/m
A block of mass m is suspended from a spring of negligible mass. The block is pulled down a distance x from its equilibrium position and released. If the amplitude of the resultant oscillation is A, the total mechanical energy of the system is:
a) kx^2
b) (1/2)kA^2
c) (1/2)mv^2
d) (1/2)kx^2 + (1/2)mv^2
A body of mass m moving with a velocity v collides with another body of mass 2m at rest. If the coefficient of restitution between the bodies is e, the velocity of the first body after the collision is:
a) ev
b) e(3/2)v
c) e(1/2)v
d) e(1/3)v
A block of mass m slides down a rough inclined plane of height h and length l. The coefficient of kinetic friction between the block and the plane is μ. If the block starts from rest, its velocity at the bottom of the plane is:
a) √(2ghμ/(1+μ^2))
b) √(2gh/(1+μ^2))
c) √(ghμ/(1+μ^2))
d) √(gh/(1+μ^2))
A block of mass m is dropped from a height h above the ground. Just before hitting the ground, its velocity is v. The work done by the gravitational force on the block during its fall is:
a) mgh
b) 0
c) mv^2/2
d) mg(h-v^2/2g)
We hope there NEET MCQ of Class 11 Work, Energy and Power will help you to score an excellent rank in NEET-UG. If you have any queries feel free to write in the comments section. We at Study Rate are always ready to serve our students.
