A block of mass 10 kg is moving in X-direction with a constant speed of 10 ms⁻¹.It is subjected to a retarding force F=-0.1 x m⁻¹, during its travel from x=20m to x=30m.Its final kinetic […]
A car moving with a speed of 50 kmh⁻¹ can be stopped by brakes after at least 6 m.If the same car is moving with 100 kmh⁻¹, the minimum stopping distance is
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A particle moves along the x-axis from x=0 to x=5 m under the influence of a force given by F=7-2 x + 3x². The work done in the process is
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(a) 70 […]
A particle of mass m is driven by a machine that delivers a constant power k watts.If the particle starts from rest the force on the particle at time t is
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(a) √(mk/2) […]
Assertion(A) :The change in kinetic energy of a particle is equal to the work done on it by the net force. Reason(R) : Change in kinetic energy of a particle is equal to the work […]
A particle free to move along X-axis has potential energy given as U(X) =k(1-e-ˣ²),where k is a positive constant of appropriate dimension.Then, for -a
A high altitude, a body explodes at rest into two equal fragments with one fragment receiving horizontal velocity of 10 m/s.Time taken by the two radius vectors connecting point of explosion of fragments to make […]
A small block of super dense material has mass 3 x 10²⁴ kg.It is situated at a height h(
Three objects A,B and C are kept in a straight line on a frictionless horizontal surface.These have masses m,2m and m respectively.The object a moves towards b with a speed 9 m/s and makes an […]
A uniform force of (3i+j) N acts on a particle of mass 2 kg.Hence the particle is displaced from position (2i+k)m to position (4i+3j-k)m.The work done by the force on the particle is
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