A body of mass 10 kg is travelling with a uniform speed of 5 m/s. Its kinetic energy is:
Correct answer: A. 125 J
- A. 125 J
- B. 250 J
- C. 500 J
- D. 255 J
Explanation
m=10 kgv=5 ms^-1Kinetic energy K.E= ½ mv^2 K.E= ½ [10][5]^2 K.E= 5*25 K.E= 125 J
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Kinetic Energy
Kinetic energy is the energy of motion, given for a nonrelativistic object by K = ½mv², so it depends on mass and the square of speed. Questions connect kinetic energy with work through the work energy theorem, calculate changes in kinetic energy, and distinguish it from momentum and potential energy.
Practise Work and Energy
748 free Work and Energy MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Kinetic Energy questions
A stone of mass 1 kg is dropped from a height of 10 m with the speed of 14 m/s. The approximate kinetic energy is:
A body of mass 'm' is moving with velocity 'v'. After a short interval of time its velocity becomes double. How many times its K.E will increase or decrease?
If the speed of a body is doubled, its kinetic energy becomes:
When the momentum of body is increased by 200%, its kinetic energy increases by:
A bullet of mass 5 x 10^-5 has te velocity of 200 m/s, kinetic energy of bullet is:
A disc of radius 2 m and mass of 100 kg roll on a horizontal surface, its center of mass has speed of 2 cm/s, how much work is needed to stop it?