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physics- please help

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Question #1 A 0.140kg- baseball traveling 30.0m/s strikes the catcher's mitt, which, in bringing the ball to rest, recoils backward 14.0cm .
What was the magnitude of the average force applied by the ball on the glove?

question #2

How much tension must a rope withstand if it is used to accelerate a 1180kg car horizontally along a frictionless surface at 1.20m/s^2 ?

  • physics- please help -

    a ={v(f)^2 – v(i)^2}/2•s = - v(i)^2}/2•s = 30^2/2•0.14=3.21•10^3 m/s^2
    F = m•a =0.14•3.21•10^3 =450 N
    T=F= m•a = 1180•1.2 =1416 N

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