alleryStart learning →A 2 kg trolley moves at 3 m/s. Its kinetic energy is?
A36 J
B9 J
C6 J
D18 J
Answer & Solution
Correct answer: B. 9 J
Its kinetic energy is one-half of 2 × 3², which is 9 J.
Keep practising Work, Energy and Power
Browse all Work, Energy and Power questions for ICSE Class 8, or explore more Physics topics.
Related questions
B steadily lifts twice A's mass through half A's height in twice A's time. Useful lifting A gives 100 W for 5 s; B gives 40 W for 20 s. Which transfers more energy?A ball has KE 20 J and GPE 30 J. With no losses, GPE falls to 10 J. New KE?A body drops from rest through 5 m without air resistance. Final speed? g = 10 m/s².Unequal masses have equal GPE above ground. Dropped from rest without air, faster at grounBodies of 4 kg and 1 kg have equal kinetic energy. Speed ratio heavy:light?Mass becomes three times as large and speed halves. Kinetic energy becomes?A 50 W device runs for 3 minutes at that power. Energy transferred?