A car of mass $1000 k g$ starts from rest and attains the velocity of $10 m / s$ in $5 s e c$ . Calculate the work done by the normal reaction of the car.

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Solution

$W = F \times s$

$W = m a \times (u t + \frac{1}{2} a t^{2})$

$= (1000 \times 2) \times (0 \times 5 + \frac{1}{2} \times 2 \times 5^{2})$

$= 2000 \times 25$

$= 100 k J$

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A car of mass 1000 kg starts from rest and attains the velocity of 10 m/s in 5 sec. Calculate the work done by the normal reaction of the car.

W=F×sW=ma×(ut+12at2)=(1000×2)×(0×5+12×2×52)=2000×25=100kJ

A car of mass $1000 k g$ starts from rest and attains the velocity of $10 m / s$ in $5 s e c$ . Calculate the work done by the normal reaction of the car.

$W = F \times s$

$W = m a \times (u t + \frac{1}{2} a t^{2})$

$= (1000 \times 2) \times (0 \times 5 + \frac{1}{2} \times 2 \times 5^{2})$

$= 2000 \times 25$

$= 100 k J$