According to the NASA study referenced in the New Science of Learning presentation, a ____ nap significantly improved the flying performance of NASA astronaughts.    Question 18 options:   7   17   27   37

A bag is dragged up a rough slope at a constant speed by a rope on a winch. The kinetic energy of the bag is 500 J and it gains 1000 J in potential energy as it is dragged up the slope. If the work done by the winch to lift the bag up the slope is 1500 J, how much energy was lost as thermal energy?

A dog races up the stairs in a time of 1.80 seconds.  If the stairs are 12 feet high, how much power in hp is the dog putting out?  The weight of the dog is 48 lbs.

What power is needed to lift a 49-kg person a vertical distance of 5.0 m in 20.0 s? 120 W 25 W 60 W 210 W 12.5 W

What is the power rating of a motor that is capable of lifting a 100 kg object to a height of 20 m in one minute? (hint: watch your units) a 33 W b 19600 W c 327 W d 2000 W

A man pushes a lawn mower on a level lawn with a force of 189 N. If 28% of this force is directed forward, how much power does he expend in pushing the mower 5.5 m in 16 s?

A person is 170 cm tall. He holds a 10 kg object on his head for 10 minutes. How much work is done on the object?

Water flows over a section of a waterfall at the rate of 5.6 ✕ 104 kg/s and falls 40 m. How much power is generated by the falling water

A penny is dropped from the top of the statue of liberty. The statue if liberty is 93 m tall. If a penny has about 3 jould of gravitational potential energy at the top, how much kinetic energy will it have half way point (45.6 m)

A man pushes a lawn mower on a level lawn with a force of 203 N. If 53% of this force is directed forward, how much power does he expend in pushing the mower 4.7 m in 16 s?