Asked by Nathan

You throw a 5.5 g coin straight down at 4.0 m/s from a 25-m-high bridge.

A) How much work does gravity do as the coin falls to the water below?

B)What is the speed of the coin just as it hits the water?

Answers

Answered by bobpursley
a. mass*g*height
b. KE at bottom= mgh+1/2 m vi^2
= m(25*9.8)+m (1/2*16)
but KE at bottom=1/2 m vf^2
so vf=sqrt (2*25*9.8 +16)

Answered by Vaati
A:(5.5g)(9.81m/s^2)(50m)+ 2698g*m^2/s^2
B:32m/s
Answered by Vaati
A:(5.5g)(9.81m/s^2)(50)=2698g*m^2/s^2
Answered by Ettienne
30m/s
Answered by Abby
A) Mass X g X height
Change the mass into kg
(.0055) X 9.8 X 25
Answered by Jacob
Do not forget to convert the grams to kg to get the right answer.
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