Work, Energy and Power questions
712 published questions with worked solutions.
- A body of mass 2 kg is moving along x-direction such that its displacement as function of time is given by x(t) = t^2 + t + m,...
- Given below are two statements : Statement I: An object moves from position r_1 to position r_2 under a conservative force field...
- A force F = 2 i +b j + k is applied on a particle and it undergoes a displacement i -2 j - k . What will be the value of b, if...
- A force f = x^2y i +y^2 j acts on a particle in a plane x + y = 10. The work done by this force during a displacement from (0, 0)...
- A force F = + x^2 acts on an object in the x-direction. The work done by the force is 5J when the object is displaced by 1 m. If...
- Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A: In a central...
- A sand dropper drops sand of mass m(t) on a conveyer belt at a rate proportional to the square root of speed (v) of the belt,...
- A block of mass 1 kg, moving along x with speed v_i = 10 m/s enters a rough region ranging from x = 0.1 m to x = 1.9 m. The...
- Water falls from a height of 200 m into a pool. Calculate the rise in temperature of the water assuming no heat dissipation from...
- A block of mass 25 kg is pulled along a horizontal surface by a force at an angle 45° with the horizontal. The friction...
- Which one of the following forces cannot be expressed in terms of potential energy ?
- When a rubber-band is stretched by a distance x, it exerts a restoring force of magnitude F = ax + bx^2 where a and b are...
- A person trying to lose weight by burning fat lifts a mass of 10 kg upto a height of 1m 1000 times. Assume that the potential...
- A time dependent force F = 6t acts on a particle of mass 1 kg. If the particle starts from rest, the work done by the force...
- A uniform cable of mass 'M' and length 'L' is placed on a horizontal surface such that its ( 1 n )^ th part is hanging below the...
- A bullet of mass 20 g has an initial speed of 1 ms^ -1 , just before it starts penetrating a mud wall of thickness 20 cm. If the...
- A force acts on a 2 kg object so that its position is given as a function of time as x = 3t^2 + 5. What is the work done by this...
- A person of mass M is sitting on a swing of length L and swinging with an angular amplitude _0. If the person stands up when the...
- A particle of mass m and charge q is in an electric and magnetic field given by E = 2 i + 3 j; B = 4 j + 6 k. The charged...
- A particle which is experiencing a force, given by F = 3 i - 12 j, undergoes a displacement of d = 4 i. If particle had a kinetic...
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