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2 years ago

Please help it's for a test.

Physics

1 answer:

Andreas93 [3]2 years ago

7 0

Answer:

Explanation:

$KE=\frac{1}{2}mv^2$ so filling in:

$KE=\frac{1}{2}(1000)(30)^2$ so to 2 sig figs (which is actually not accurate, but oh well...)

KE = 450000 J

If we want to find out how high it will have to travel up a hill so that its PE is the same as the KE at this speed, we set the value for KE = to PE:

450000 = (1000)(9.8)h so

$h=\frac{450000}{(1000)(9.8)}=45.9m$

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Answer:

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Explanation:

We have,

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3 years ago

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3 years ago

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3 years ago

A 7382 N piano is to be pushed up a(n) 2.16 m frictionless plank that makes an angle of 22.7 ◦ with the horizontal. Calculate th

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Answer:

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Explanation:

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3 years ago