Tuesday
June 18, 2013

# Homework Help: Physics

Posted by Syafiqa on Saturday, July 17, 2010 at 12:47pm.

What net braking force must be applied to stop a car with a mass of 900 kg initially travelling at a velocity of 100 km/h within a straight-line distance of 50 m?

• Physics - drwls, Saturday, July 17, 2010 at 1:30pm

(Braking Force) x distance = Initial Kinetic Energy

Force times distance is work done against friction, which must equal the initial kinetic energy.

Change 100 km/h to m/s before calculating Kinetic Energy

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