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jeyben [28]
3 years ago
8

3. A 70 kg person climbs a 6 m ladder. How much work is required by the person?

Physics
1 answer:
Lina20 [59]3 years ago
6 0

Answer:

4116J

Explanation:

Given parameters:

Mass of the person  = 70kg

Height of the ladder  = 6m

Unknown:

Work done  = ?

Solution:

The work done by the person climbing is the same as the potential energy.

Work done is the force applied to move a body through a distance;

So;

   Potential energy  = mass x acceleration due to gravity x height

Therefore;

    Potential energy  = 70 x 9.8 x 6   = 4116J

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We apply the initial formula

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Let's look for the error  (uncertainly) of Re

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Let's look for the uncertainty of this equation

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The uncertainty of a sum is

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     ΔR_{e} = 84   Ω

Let's write the resistance value with the correct significant figures

    R_{e} = (40 ± 8) 10¹   Ω

6 0
3 years ago
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