NEET Physics Work, Energy, and Power Work Energy Theorem By Constant Force MCQs

A droplet of water with mass $1g$ falls from rest from a height of $1km$. Ignoring air resistance, what is its kinetic energy just before it hits the ground? (Take $g = 10 m/s^2$)

A rain droplet of mass $1g$ falls from a height of $1km$. Due to air resistance, it hits the ground with a speed of $40 m/s$. What is the magnitude of the work done by the resistive force? (Take $g = 10 m/s^2$)

A force of 5N, making an angle $heta$ with the horizontal, acting on an object displaces it by 0.4m along the horizontal direction. If the object gains kinetic energy of 1J, the horizontal component of the force is

A force of 5N, making an angle $heta$ with the horizontal, acting on an object displaces it by 0.4m along the horizontal direction. If the object gains kinetic energy of 1J, the horizontal component of the force is

A machine which is 75% efficient uses 12 J of energy in lifting up a 1 kg mass through a certain distance. The mass is then allowed to fall through, that distance. The velocity of the ball at the end of its fall is

A machine which is 75% efficient uses 12 J of energy in lifting up a 1 kg mass through a certain distance. The mass is then allowed to fall through, that distance. The velocity of the ball at the end of its fall is

According to work-energy theorem, the work done by the net force on a particle is equal to the change in its

A bullet of mass 0.05 kg moving with a speed of $80\;m{s^{ - 1}}$ enters a wooden block and is stopped after a distance of 0.40 m. The average resistive force exerted by the block on the bullet is

A bullet of mass 0.05 kg moving with a speed of $80\;m{s^{ - 1}}$ enters a wooden block and is stopped after a distance of 0.40 m. The average resistive force exerted by the block on the bullet is

A body of mass 4 kg is moving with momentum of $8{\rm{\;kg}} - {\rm{m}}{{\rm{s}}^{ - 1}}$. A force of 0.2 N acts on it in the direction of motion of the body for 10 s. The increase in KE in joule is