Problem 1 You climb up the stairs from the ground floor to the 10th floor is m 8

Question

Problem 1 You climb up the stairs from the ground floor to the 10th floor is m 80 kg, and you go up a height of h = 40 m. How much w did gravity do by climbing up the stairs? . Your mass ork (W7-1) Problem 2: A mountain climber starts from the base camp and climbs to the peak of Mt. Everest. He then climbs back down to the starting point. What was the total work (I,-?) done by gravity? Problem 3: You push your desk horizontally in a circular arc of radius R 3 m, as shown on the figure. The mass of the desk is m = 15 kg, and the cofficient of kinetic friction between the floor and the desk is tak-0.3. Find the work done by friction as you go from A to B. Would the answer change if the path you took was a straight line? Problem 4: A spring is compressed an amount of 10 cm. The spring constant is k = 150 N/m. How much potential energy(Um) is stored in the spring?

Explanation / Answer

as you have asked multiple question but i am bound to answer only first one

1) given mass m = 80 kg

climb height of h = 40 m

we know that

work done by gravity = Wg = mgh

= 80 x 9.81 x 40

= 31392 J

answer)

2) as total displacment of climber = 0

Wg = 0

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