This page covers NDA Work Energy Power with complete concept notes, 18 graded practice MCQs, key points and exam-specific tips. Free to study.
18graded MCQs · easy to hard · full solution & trap analysis
Which of the following statements correctly defines kinetic energy?
A 4 kg block is pushed with a force of 16 N at an angle of 60° to the horizontal direction for a distance of 3 m. Calculate the work done by the applied force.
A force of 20 N is applied to move an object 5 m in the direction of the force. Calculate the work done.
A 2 kg object is lifted vertically through a height of 10 m. How much work is done against gravity? (Take g = 10 m/s²)
An engine does 5000 J of work in 10 seconds. What is its power output?
According to the work-energy theorem, the net work done on an object equals its change in:
A 5 kg object is raised 4 m and then lowered 2 m from its initial position. Net work done by gravity is: (g = 10 m/s²)
If a 10 W bulb operates for 1 hour, how much energy does it consume?
A ball of mass 0.5 kg is thrown vertically upward with initial velocity 20 m/s. Its kinetic energy at the highest point is: (g = 10 m/s²)
A force of 20 N is applied to move an object 5 m in the direction of the force. Calculate the work done.
A 2 kg object is lifted vertically upward by 10 m. How much work is done against gravity? (g = 10 m/s²)
A force of 15 N is applied at 60° to the displacement of 8 m. Find the work done.
A car of mass 1000 kg accelerates from rest to 20 m/s. What is the kinetic energy gained?
An engine does 5000 J of work in 10 seconds. What is its power output?
A block of mass 5 kg is pushed across a frictionless horizontal surface by a constant force of 20 N applied at 60° above the horizontal. The block moves 10 m. Calculate the work done by the applied force.
A 2 kg object is lifted vertically upward from rest through a height of 5 m. If the lifting force is constant and the object reaches a velocity of 4 m/s at the top, find the work done by the lifting force (g = 10 m/s²).
A motor delivers 1500 W of mechanical power to lift a load. How long will it take to lift a 300 kg load to a height of 20 m at constant velocity (g = 10 m/s²)?
A 4 kg ball is thrown upward with an initial velocity of 20 m/s. Taking g = 10 m/s², which statement correctly relates work and kinetic energy at maximum height?