Simple two part physics problem

User Generated

qhqrnznmvat3

Science

Description

A sprinter explodes out of the starting block with an acceleration of +3.3 m/s2, which she sustains for 1.1 s. Then, her acceleration drops to zero for the rest of the race.

(a) What is her velocity at t = 1.1 s?

(b) What is her velocity at the end of the race?

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Explanation & Answer

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Think about the two components of her travel distance 1) in cart = +3.3m/s while walking 1.1*t (t=unknown time that we wish to solve) Then the total distance which can be expressed as the total time(1.1)*ave speed. Equate the two, and solve for t

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Anonymous
Really great stuff, couldn't ask for more.

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