Homework Help: physic

Posted by habiba abdullahi on Tuesday, January 29, 2013 at 6:06pm.

a motor of mass 800kg traveeling at 20m/s
is brought to rest by brakes in 100m calculate the average braking force required if the object moves in three second

physic - bobpursley, Tuesday, January 29, 2013 at 6:35pm
vf^2=vi^2+2acceleration*distance
but acceleration=force/mass

solve for force

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