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3 years ago

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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The physiological need include:

harina [27]

Answer:

Explanation:

food for energy, security from theft and privacy

5 0

2 years ago

Sasha lifts a couch 8.2 meters from the ground floor of her house to the attic. If the couch has a mass of 120 kg, what is the g

gavmur [86]

As we know that gravitational potential energy is given by

$U = mgH$

here we have

m = mass = 120 kg

$g = 9.81 m/s^2$

h = height = 8.2 m

now from above formula

$U = 120kg (9.81 m/s^2) (8.2 m)$

$U = 9653.04 J$

so above is the gravitational potential energy of the couch

4 0

2 years ago

Read 2 more answers

Two iron bolts of equal Mass one at a hundred see another at 55 Sierra place in the insulated cylinder assuming the heat capacit

malfutka [58]

Answer:

$T_2 = 77.5c$

Explanation:

From the question we are told that

Temp of first bolts $T_1=100$

Temp of 2nd bolt $T_2=55$

Generally the equation showing the relationship between heat & temperature is given by

$q=cm \triangle T$

Generally heat released by the iron bolt = heat gained by the iron bolt

Generally solving mathematically

$-(0.45*m* (T_2-100 \textdegree c)) = 0.45*m*(T_2 -55\textdegree c)$

$-(T_2-100 \textdegree c)) = (T_2 -55 \textdegree c)$

$T_2 +T_2= 100 \textdegree c+55 \textdegree c$

$T_2=\frac{155 \textdegree c}{2}$

$T_2 = 77.5 \textdegree c$

Therefore $T_2 = 77.5 \textdegree c$ is the final temperature inside the container

5 0

2 years ago

Mary starts at the edge of a circular platform that is slowly rotating on a frictionless axle. She then walks towards the opposi

bulgar [2K]

Answer:

Explanation:

The motion of Mary along the circular path is a centripetal.

As Mary moves from one edge of the circular platform to the other edge, she is covering a distance which is the radius of the circular path at a velocity.

According to the relationship

w = v/r where

w is the angular velocity

r is the radius

v is the linear velocity

Initially, before Mary starts, her linear speed is zero and her angular velocity is also zero. As she move towards the opposite edge, she is covering a distance of radius r. According to the formula, increase in radius will leads to decrease in her angular velocity and vice versa. As Mary starts moving towards the centre of the circular path, her angular velocity increases, at the centre of the platform, her angular velocity is at maximum at this point. As she moves further from the center to the other edge, her angular velocity decreases due to increase in distance covered across the circular path.

6 0

2 years ago

What is the net force needed to accelerate a 21.4 kg grocery sack upward at 1.5 m/s2?

marshall27 [118]

Answer:

32.1 N Please Give Brainliest

Explanation:

force = mass x acceleration

8 0

2 years ago

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

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