On a hot summer day in the state of Washington while kayaking, I saw several swi

Question

On a hot summer day in the state of Washington while kayaking, I saw several swimmers jump from a railroad bridge into the Snohomish River below. The swimmers stepped off the bridge, and I estimated that they hit the water 1.00s later.

Part A

How high was the bridge?

Express your answer using two significant figures.

Part B

How fast were the swimmers moving when they hit the water?

Express your answer using two significant figures.

Part C

What would the swimmer's drop time be if the bridge were twice as high?

Express your answer using two significant figures.

Explanation / Answer

Part A)

Apply d = vot + .5at2

d = 0 + .5(9.8)(1)2

d = 4.9 m

Part B)

Apply vf = vo + at

vf = 0 + (9.8)(1)

vf = 9.8 m/s

Part C)

Appy d = vot + .5at2

9.8 = 0 + .5(9.8)(t2)

t = 1.4 sec

Related Questions

Navigate

• Browse (All)
• Browse O
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.