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Yuliya22 [10]
3 years ago
6

When we jump on a concrete surface , the feet gets injured,why?​

Physics
2 answers:
erastovalidia [21]3 years ago
8 0

Because the gravity pulls use towards the ground and our bones can’t take the amount of weight hitting the surface

wariber [46]3 years ago
5 0

What part of your body hits the ground first?

Your legs, knees and torso can flex and accommodate some deceleration, but when you go airborne, even briefly, you accelerate downward, and that in effect increases the “weight” your body must suddenly bear in impact.

Try this at home. Get something heavy, like a box full of paperback books. Now, take go up two steps, turn around, and carefully step over the first step directly onto the ground.

Your feet really notice it don’t they. Maybe even sting a bit.

Now imagine you missed that first step accidentally, and your foot slammed down an additional 8...(more)

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In which of the following is positive work done by a person on a suitcase
MrRa [10]

pendajo sMh so stupid

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A student drops a ball from the top of a 10-meter tall building. The ball leaves the thrower's hand with a zero speed. What is t
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Answer:

14 m/s

Explanation:

u = 0, h = 10 m, g = 9.8 m/s^2

Use third equation of motion

v^2 = u^2 + 2 g h

Here, v be the velocity of ball as it just strikes with the ground

v^2 = 0 + 2 x 9.8 x 10

v^2 = 196

v = 14 m/s

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A star is born when gas and dust from a nebula become so dense and hot that nuclear fusion starts. Which of the following forces
Kitty [74]
Your Question:
<span>A star is born when gas and dust from a nebula become so dense and hot that nuclear fusion starts. Which of the following forces is responsible for the formation of a star?
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8 0
2 years ago
Read 2 more answers
3, A 4kg block is pushed 2m at an acceleration of 0.2m/s square up a vertical wall by a constant force F applied at an angle of
Andrews [41]

The work done by the applied force on the block against the frictional force is 15.75 J.

<h3>Work done by the applied force</h3>

The work done by the applied force is calculated as follows;

W = Fd

F - Ff = ma

where;

  • F is applied force
  • Ff is frictional force

Fcos(37) - μmgsin(37) = ma

Fcos(37) - (0.3)(4)(9.8)sin(37) = 4(0.2)

0.799F - 7.077 = 0.8

F = 9.86 N

W = Fdcosθ

W = 9.86 x 2 x cos(37)

W = 15.75 J

Thus, the work done by the applied force on the block against the frictional force is 15.75 J.

Learn more about work done here: brainly.com/question/25573309

#SPJ1

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1 year ago
The__ of friction is a number that represents the resistance to sliding
Tresset [83]

Answer:

B. coefficient

Explanation:

i dont have to explain right?

3 0
3 years ago
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