A car that weighs 14900.0 N is initially moving at a speed of 57.0 km/hr when the brakes are applied and the car is brought to a stop in 4.8 s. Find the magnitude of the force that stops the car, assuming it is constant.
I found a using Vf=vi+at...a = 11.88 m/s^2. Then I found the mass of the car using Fwt = mg...mass = 1520.4 kg. Then I found EFx using EFx = ma...EFx = 18062.35.
But this is wrong. Where did I mess up?
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I get a different answer for acceleration. Check your conversion from 57.0 km/hr to ?? m/s.
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