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DaniilM [7]
3 years ago
14

When jumping straight down, you can be seriously injured if you land stiff-legged. One way to avoid injury is to bend your knees

upon landing to reduce the force of the impact. A 73.0 kg man just before contact with the ground has a speed of 6.46 m/s. In a stiff-legged landing he comes to a halt in 2.07 ms. Calculate the average net force that acts on him during this time
Physics
1 answer:
Alex Ar [27]3 years ago
7 0

Answer:

Explanation:

The man comes to halt due to reaction force acting on him in opposite direction . If R be the reaction force

impulse by net  force = change in momentum

Net force = R - mg , mg is weight of the man .

( R-mg ) x 2. 07 x 10⁻³ = 73 x 6.46 - 0

R - mg = 227.81 x 10³

Average net force = 227.81 x 10³ N .

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4 0
2 years ago
A ball with mass of 0.050 kg is dropped from a height of h1 = 1 .5 m. It collides with the floor, then bounces up to a height of
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= √ 2x 9.8 x 1

= 4.427 m / s.

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= 0.489 J

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4 0
3 years ago
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Evgesh-ka [11]
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2.3 The motion of an object is accelerated
alekssr [168]

Answer:

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6 0
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To store stacks of clean plates, a cafeteria uses a closed cart with a spring-loaded shelf inside. Customers can take plates off
ruslelena [56]

The answer for the following problem is mentioned below.

The option for the question is "A" approximately.

  • <u><em>Therefore the elastic potential energy of the string is 20 J.</em></u>

Explanation:

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where;

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So therefore,

Substituting the values in the above formula;

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<u><em>Therefore the elastic potential energy of the string is 20 J.</em></u>

5 0
3 years ago
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