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A car of mass 1000kg accelerates uniform...

A car of mass 1000kg accelerates uniformly from rest to a velocity of `54km//h` in 5 seconds. Calculate (i) its acceleration (ii) its gain in KE (iii) average power of the engine during this period.

A

`2000 W`

B

`45000 W`

C

`2250 W`

D

`22500 W`

Text Solution

Verified by Experts

As power `= ((1)/(2)mv^(2))/(t) = ((1)/(2) xx 1000 xx (15)^(2))/(5) = 22500 W`
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Knowledge Check

  • A car of mass 1000 kg accelerates uniformly from rest to a velocity of 54 km/hour in 5s. The average power of the engine during this period in watts is (neglect friction)

    A
    2000 W
    B
    22500 W
    C
    5000 W
    D
    2250 W

  • A body of mass 1 kg accelerates uniformly from rest to a velocity of 1 m s^(-1) in 15 seconds. At what time the kinetic energy of the body will be 2/9 J ?

    A
    4s
    B
    8s
    C
    10s
    D
    12 s
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