noahtheking67
12.04.2020 •
Physics
Can someone please help me quick :(
A toy spring with a spring constant of 6.4 N/m has a relaxed length of 20.0 cm. When a ball is attached to the end of the spring and allowed to come to rest, the vertical length of the spring is 75.0 cm. What is the elastic potential energy stored in the spring
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Ответ:
PE = 0.968 J
Explanation:
the formula for potential elastic energy is
PE = kx^2/2
k = spring constant 6.4 N/m
x = displacement = 75 - 20 = 55 cm = 0.55m
plug these values into the equation
PE = 6.4(0.55)^2 / 2
PE = 0.968 J
Ответ:
An increase in voltage causes the flow of electric current to INCREASE. An increase in resistance causes the flow of electric current to DECREASE.
100% right