First slide

Second law

Question

What is the magnitude of the total force on a driver by the racing car he operates as it accelerates horizontally along a straight line from rest to 60m/s in 8.0s (mass of the driver=80kg)

Moderate

A

0.06KN
B

0.78KN
C

1.4KN
D

1.0KN

Solution

$F = ma, F_{1} = \frac{m (v - u)}{t}; F_{2} = mg, F = F_{1} + F_{2}$

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