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At time t = 0, an object is dropped from point A that rebounds inelastically (losing some of its kinetic energy) with a speed of 10 m/s after making a collision with the ground. It finally attains the maximum possible height at t = 4 s. What is the difference of heights at t = 0 and at t = 4 s ? (Ignore air resistance as well as the time of impact) 

(a) 35 m 

(b) 40 m 

(c) 45 m 

(d) zero

1 Answer

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Best answer

Correct option: (b) 40 m

Explanation:

Difference in height = h2 – h1 = 45 – 5 = 40 m

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