Answer:
(a) t = 0.02111
(b) F = 337.5 N
Step-by-step explanation:
We can apply work energy theorem to solve this problem,
(change in kinetic energy = Force applied)
substituting the values given in the question,

solving we get,
We have the equation,

substituting the value of m and F we get,

We can calculate the duration of impact using the kinematical equations,


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