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Work Power and Energy question

2016 · 9 Apr · Shift 1 · Q64

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JEE Main
Physics
Work Power and Energy
2016 · 9 Apr · Shift 1 · Q64

Work Power and Energy question

2016 · 9 Apr · Shift 1 · Q64

JEE MainPhysicsWork Power and EnergyMCQ+4 / −1

A car of weight W is on an inclined road that rises by 100 m over a distance of 1 km and applies a constant frictional force

{W \over 20}

on the car. While moving uphill on the road at a speed of 10 ms−1, the car needs power P. If it needs power

{p \over 2}

while moving downhill at speed v then value of

\upsilon

is :

A
20 ms $-$ 1
B
15 ms $-$ 1
C
10 ms $-$ 1
D
5 ms $-$ 1

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