If a motorbike of mass 150 kg moving with the speed of 36 km/hr produces acceleration of 5 m/s3

in 5 sec, What will be the power developed on it?

P = 7500 [W]

Explanation:

First We must use Newton's second law to find the force. Newton's Second Law tells us that the sum of forces on a body is equal to the product of mass by acceleration.

∑F = m*a

where:

m = mass = 150 [kg]

a = acceleration = 5 [m/s²]

We know that the work is determined by multiplying the force by the distance, in this way the units of the work are [N*m] which corresponds to 1 Joule [J].

And the power is determined by dividing the work by the time, in this way we have that [J/s] corresponds to 1 [W].

We must convert the speed from kilometers per hour to meters per second.

where:

P = power [W]

F = force = 750 [N]

v = 10 [m/s]

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the answer is 12 as i may remember

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