Question

A 2400-kg car is moving at 20 m/s when it slams on the brakes and skids to a stop with a leftward acceleration

of 7 m/s/s.

Answer 1

The braking force that caused the car to skid to a stop is given by the equation:

Force = mass * acceleration

Plugging in the values for the mass of the car (2400 kg) and its acceleration (-7 m/s/s), we get:

Force = 2400 kg * (-7 m/s/s)

= -16800 N

This is the force that the brakes had to exert on the car in order to bring it to a stop. This force would have acted in the opposite direction to the car's motion, or to the right in this case.