Calculate the minimum average power output necessary for a person to run up a 12.0 m long hillside, which is inclined at 25.0° above the horizontal, in 3.00 s. You can neglect the person's kinetic energy

Express your answer in horsepower. (1 hp = 746 W)
A) 1.24 hp
B) 2.93 hp
C) 1.86 hp
D) 0.740 hp


Answer: A

Physics & Space Science

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This graph shows how the time dilation factor (t?/t) depends on the speed of an object moving by you. How fast does an object have to be moving for you to see its time running about 20% slower than normal (about 80% of normal)?

A) 0.6c B) 0.2c C) 0.8c D) None of the choices are correct; time must be the same for everyone.

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