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Apothem
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Homework Statement
"The constant force resisting the motion of a car of mass 1500kg is 980N. If, when traveling at 48kmhr-1, the car is brought to rest in a distance 50m by applying the brakes, find the additional retarding force due to the brakes (assumed constant)
Homework Equations
SUVAT: v2=u2+2as, rearranged to a=(v2-u2)/2s
Newton's Second Law: F=ma
The Attempt at a Solution
I used suvat (s=50m , u=48kmhr-1=13.3ms-1 [3.S.F.] , v=0ms-1 , a=a , t=t) to calculate the deceleration as 1.77ms-2 [3.S.F.], I then used F=ma, and found the force to be 2655N, is this right?