Physics · Forces and Motion
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Car "X" is travelling at half the speed of car "Y" and mass of car X is twice as compared to the mass of car 'Y". Which of the following statements is correct?
- A
Car "X' has half of the kinetic energy of car "Y'
- B
Car "X" has one quarter of the K.E of car "Y"
- C
Car 'X" has twice the K.E of car "Y'
- D
The two cars have the same KE
Car X
speed = v/2 amd mass = 2m
Car Y
speed = v and mass = m
Kinetic energy of X is mv²/4and that of Y is.mv²/2 It is half of Y so this is correct.
It doesn’t have quarter as it has half Y’s KE
is also wrong in light of given explanation.
is also wrong in light of given explanation.
Tagged under Physics · Forces and Motion · 2019