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vovikov84 [41]
3 years ago
9

) A skier starts down a frictionless 32° slope. After a vertical drop of 25 m, the slope temporarily levels out and then slopes

down at 20°, dropping an additional 38 m vertically before leveling out again. Find the skier’s speed on the two level stretches
Physics
1 answer:
EastWind [94]3 years ago
5 0

Answer:

The skier’s speed on the two level stretches are 22.13 m/s and 27.29 m/s.

Explanation:

Given that,

Slope down = 32°

Height = 25 m

Before leveling,

Slope down = 20°

Height = 38 m

We need to calculate the skier’s speed on the two level stretches

Using formula of energy

P.E=K.E

mgh=\dfrac{1}{2}mv^2

v=\sqrt{2gh}

For first stretch,

Height = 25 m

Put the value into the formula

v=\sqrt{2\times9.8\times25}

v=22.13\ m/s

For second stretch,

Height = 38 m

Put the value into the formula

v=\sqrt{2\times9.8\times38}

v=27.29\ m/s

Hence, The skier’s speed on the two level stretches are 22.13 m/s and 27.29 m/s.

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