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A 15 kg block is accelerated at 1.7 m/s2 up a frictionless plane inclined at 5.0° to the horizontal, with the speed increasing from 10 m/s to 35 m/s.
(a) What is the change in the block's mechanical energy?
J
(b) What is the average rate at which energy is transferred to the block?
W
(c) What is the instantaneous rate of that transfer when the block's speed is 10 m/s?
(d) What is the instantaneous rate of that transfer when the block's speed is 35 m/s?
On a cool morning, when the temperature is 16 deg Celsius, you measure the pressure in your car tires to be 20.0 psi. After driving 40 mi on the freeway, temperature of your tires is 56.0 deg Celsius. What pressure will your tire gauge now show.
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