A60-kg skier starts at the top of a 10-meter high slope. at the bottom, she is traveling 10 m/s. how much energy does she lose to friction?

5,880 j

2,880 j

she doesn't lose any because mechanical energy is always conserved.

3,000 j

Consider the difference between the initial and final mechanical energy values.

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min