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3 years ago

A force of 157 N is applied to a box 25o above the horizontal. If it is applied over a distance of 14.5 m how much work is done?

Physics

1 answer:

malfutka [58]3 years ago

4 0

Answer:

The answer to your question is: W = 2063.4 J

Explanation:

Data

Force = 157 N

angle = 25°

distance = 14.5 m

W = ?

Process

- Find the horizontal force

cos Ф = adjacent side / hypotenuse

adjacent side = hypotenuse x cosФ

a.s. = 157 x cos 25

a. s. = 142.3 N

- Find the work

W = F x d

W = 142.3 x 14.5

W = 2063.4 J

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A cord of mass 0.65 kg is stretched between two supports 8.0 m apart. If the tension in the cord is 120 N, how long will it take

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The time taken by the pulse to travel from one support to the other is 0.208 s.

<h3>Given:</h3>

The mass of the cord is m = 0.65 kg.

The distance between the supports is, d = 8.0 m.

The tension in the cord is T = 120 N.

The time taken by the pulse to travel from one support to the other is given as,

$v=\frac{d}{t}$