As Jane was setting up her projector, she realized that the images on the screen appeared blurred. How would Jane sort out the i
ssue by herself?
A.
check that the monitor is connected properly with the projector
B.
adjust the distance between the screen and the projector
C.
make changes in the system settings
D.
adjust the focus
A.
check that the monitor is connected properly with the projector
B.
adjust the distance between the screen and the projector
C.
make changes in the system settings
D.
adjust the focus
2 answers:
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Answer:
D. 4x as much
Explanation:
The answer is pretty simple. The question is asking about 10m/s and 20m/s right? Take a look at the energy at each point on the graph. At 10m/s the kinetic energy is 100 on the graph. At 20m/s the kinetic energy is 400. You'll notice that 100 x 4 is 400 - That's the answer.
You can also prove this mathematically. The formula for kinetic energy is
The question says: constant mass so we can ignore that for now.
(1/2) * 10^2 is (1/2) * 100 = 50
for the 20m/s ball it would be
(1/2) * 20^2 = 400 * 1/2 = 200
Once again, you see that it is 4x