1
Choose the correct alternative among the following: ...
Work Energy and Power
2
A bullet is fired from a rifle. If the rifle recoils freely, then the ...
Work Energy and Power
3
A light and a heavy body have equal momenta. Which one has greater K.E ...
Work Energy and Power
4
A pendulum bob has a speed of 3 m/s at its lowest position. The pendul ...
Work Energy and Power
5
A bolt of mass 0.3 kg falls from the ceiling of an elevator moving dow ...
Work Energy and Power
6
A 60 g bullet is fired through a stack of fibre board sheets 200 mm th ...
Work Energy and Power
7
A body of density ‘D’ and volume ‘V’ is lifted through height ‘h’ in a ...
Work Energy and Power
8
Power of a water pump is 2 kW. If g = 10 m/s², the amount of water it ...
Work Energy and Power
9
A car of mass m is driven with acceleration a along a straight level r ...
Work Energy and Power
10
Water falls from a height of 60 m at the rate of 15 kg/s to operate a ...
Work Energy and Power
11
At t = 0 a 1.0 kg ball is thrown from the top of a tall tower with vel ...
Work Energy and Power
12
A locomotive of mass m starts moving so that its velocity varies accor ...
Work Energy and Power
13
A force F = 5i + 3j newton is applied over a particle which displaces ...
Work Energy and Power
14
If the K.E. of a body is increased by 300%, its momentum will increase ...
Work Energy and Power
15
An open knife edge of mass M is dropped from a height h on a wooden fl ...
Work Energy and Power
16
If we throw a body upwards with velocity of 4 m/s, at what height does ...
Work Energy and Power
17
A spherical ball of mass 20 kg is stationary at the top of a hill of h ...
Work Energy and Power
18
Calculate the work done, if a wire is loaded by ‘Mg’ weight and the in ...
Work Energy and Power
19
The blades of a windmill sweep out a circle of area A. If the wind of ...
Work Energy and Power
20
Two identical cylindrical vessels with their bases at the same level e ...
Work Energy and Power
21
A spring of spring constant k is stretched by a length x from its natu ...
Work Energy and Power
22
A toy gun has a spring of force constant k. After charging the spring ...
Work Energy and Power
23
The potential energy of a particle in a force field is U = A/r^2 - B/r ...
Work Energy and Power
24
A block of mass M is hanging over a smooth and light pulley through a ...
Work Energy and Power
25
A particle of mass 100g is thrown vertically upwards with a speed of 5 ...
Work Energy and Power
26
Two bodies A and B have masses 20 kg and 5 kg respectively. Each one i ...
Work Energy and Power
27
A spring of mass M and length L (stiffness constant k) is compressed v ...
Work Energy and Power
28
From an automatic gun a man fires 360 bullets per minute with a speed ...
Work Energy and Power
29
A wind powered generator converts wind energy into electrical energy. ...
Work Energy and Power
30
A force F = 6i + 2j + 3k acts on a particle and produces a displaceme ...
Work Energy and Power
31
The potential energy of a book placed in an almirah is 15 J w.r.t. gro ...
Work Energy and Power
32
The only force acting on a 2 kg body as it moves along the positive x ...
Work Energy and Power
33
A force acts on a 30 g particle in such a way that the position of the ...
Work Energy and Power
34
The force required to tow a boat at constant velocity is proportional ...
Work Energy and Power
35
A force of F = 2i + 3j + 4k N acts on a body for 4 seconds, producing ...
Work Energy and Power
36
A car of mass m starts from rest and accelerates so that the instantan ...
Work Energy and Power
37
An elevator of total mass (elevator + passenger) 1800 kg is moving up ...
Work Energy and Power
38
A block of mass 10 kg is moving in x-direction with a constant speed o ...
Work Energy and Power
39
A block of mass 5 kg is suspended from the end of a vertical spring wh ...
Work Energy and Power
40
An engine is hauling a train of mass M kg on a level track at a consta ...
Work Energy and Power
