Question

It is required to increase the velocity of a scooter of mass 80 kg from 5 ms-1 to 25 ms-1
in 2

second. Calculate the force required.

Answer 1

Answer:

HOW TO SOLVE?

Force = mass × acceleration

Mass = 80 kg

Acceleration

$\frac{final \: velocity - initial \: velocity}{time} = acceleration$

Final velocity = 25m/s

Initial velocity = 5m/s

Time = 2s

So, Acceleration will be,

$\frac{25ms {}^{ - 1} - 5m {s}^{ - 1} }{2s} \\ \frac{20ms {}^{ - 1} }{2s} = 10ms {}^{ - 2}$

Put acceleration's value at the place of A, then it will become,

$f = 80kg \times 10 {ms}^{ - 2} \\ f = 800kg {ms}^{ - 2} or \: 800 \: newton$

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