(a) If its initial velocity is 7 m/s, what is its displacement during the time i

Question

(a) If its initial velocity is 7 m/s, what is its displacement during the time interval?



Your response differs from the correct answer by more than 10%. Double check your calculations. m

(b) What is the distance it travels during this interval?



Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. m

(c) If its initial velocity is
-7
m/s, what is its displacement during the time interval?



Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. m

(d) What is the total distance it travels during the interval in part (c)?



Your response differs from the correct answer by more than 10%. Double check your calculations. m

Explanation / Answer

a)

x=(1/2)at2+v0t

x=(1/2)a(v/a)2+v0(v/a)

x=(1/2)(4.9)(7/4.9)2+7(7/4.9)

x=15m

b)same as part a

s=15m

c)

x=(1/2)a(v/a)2+v0(v/a)

x=(1/2)(4.9)(21/4.9)2-7(21/4.9)

x=15m

d) now we have to add together the distance it goes backwards and forwards

s=(1/2)(4.9)(21/4.9)2+7(21/4.9)

s=75m

hope that helps

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