Here is my step-by- step work! ( I know you did Step 3 for me or it was done in the problem, but I redid it anyway b/c I'm a nerd like that) I got 79 meters for the answer.
-What can you say about the snowboarder’s kinetic energy as he moves?
1 answer:
Answer:
His kinetic energy increases, potential energy decreases
The sum of kinetic and potential energy is a constant at any instant before he comes to rest.
Explanation:
Snowboarder is starting from a height and moving to the down direction. As he moves down his velocity increases, we know that kinetic energy is given by the expression , so as he moves his kinetic energy increases.
When the snowboarder is starting his potential energy is maximum(Potential energy = mgh), as he comes down his potential energy decreases.
Based on this we can conclude that the sum of potential energy and kinetic energy is a constant at any instant for a snowboarder before he comes to rest.
mgh+= Constant
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Answer:
(a) T=6.07s
(b)
Explanation:
For Part (a)
The initial amplitude is given as A=7.0 cm
Apply the equation with
we have:
For Part (b)
Apply with t=4.0s and T=6.07s we have
Answer:
(a) 95 volt
(b) 134.33 volt
(c) 10.746 volt
(d) Average delivered power is 722 watt
Explanation:
We have given value of resistance R = 12.5 ohm
Current in the ammeter i = 7.60 A
(a) Rms voltage in the resistor
(b) We know that rms voltage is given by
So peak voltage will be equal to 134.33 volt
(c) Maximum current is equal to
(d) Average power delivered in the resistor is equal to
P = VI
So