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VMariaS [17]
3 years ago
12

An 80 kilogram skier slides on waxed skis along a horizontal surface of snow at a constant velocity while pushing with his poles

. What is the horizontal component of the force pushing him forward?
Physics
1 answer:
Ainat [17]3 years ago
8 0

From Newton's First law, if velocity is constant than the net force on the body is zero; or net force in horizontal direction is zero and net force in vertical direction is also zero.

If we assume that the there is negligible friction between waxed skies and snow, than there will be no frictional force on skies in horizontal direction and as net force in horizontal direction is zero, hence the horizontal component of the force pushing him forward is also zero.

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An elevator together with its passengers weights 5000 N. At a certain instant, the tension in its supporting cable is 6000 N. De
gayaneshka [121]
We have to forces acting on the system (elevator+passengers):
1) The weight (W=5000 N), acting downward
2) The cable's tension (T=6000 N), acting upward
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a= \frac{F}{m}
where m is the mass of the system.

So, we need to find F and m.
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8 0
3 years ago
A ball is dropped from a height h and falls the last half of its distance in 4 seconds. How long does the ball fall? From what h
dlinn [17]

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8 0
3 years ago
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allsm [11]

Answer:

to move an object from its place or position

Explanation:

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7 0
3 years ago
Read 2 more answers
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