A 2 kg object slides down a frictionless surface inclined at an angle of 30o from the horizontal. The total distance moved by the object along the plane is 5 meters. - How much work was done on the object by the parallel component of its weight?
- How much work was done on the object by the perpendicular component of its weight
- How much work was done on the object by the normal force?

answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s

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