Kinetic Energy - Practice Questions & MCQ

An athlete of mass 50kg in the olympic games covers a distance of 100 m in 10 s. His kinetic energy can be estimated to be in the range

A particle is projected at 60⁰   to the horizontal with a kinetic energy . The kinetic energy at the highest point

If mass-­energy equivalence is taken into account, when water is cooled to form ice, the mass of water should

A ball whose kinetic energy is ,  is projected at an angle of to the horizontal. The kinetic energy of the ball at the highest point of its flight will be

Consider the following two statements

A         Linear momentum of a system of particles is zero.

B         Kinetic energy of a system of particles is zero.

Then

A particle of mass 100 g is thrown vertically  upwards with a speed of 5 m/s. The work (in Joule) done by the force of gravity during the time the particle goes up is

A mass of M kg is suspended by a weightless string . The horizontal force that is required to displace it until the string making an angle of 45^o  with the initial vertical direction is

A particle moves in a straight line with retardation proportional to its displacement. Its loss of kinetic energy for any displacement  x is proportional to  

A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle, the motion of the particle takes place in a plane. It follows that

If momentum of a body is increased by , then its kinetic energy increases by