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3 years ago

What type of stretching is beneficial for sports performance and involves momentum

Physics

1 answer:

Katena32 [7]3 years ago

5 0

Answer:

Dynamic stretching

Explanation:

Dynamic stretching is a form of stretching beneficial in sports utilizing momentum from form.

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at the instant a traffic light turns green, a car that has been waiting at the intersection starts ahead with a constant acceler

yKpoI14uk [10]

a) time, t = 11.407 s, b) distance x = 175.66 m, v = c) speed v = 30.80 m / s

<h3>Explanation of question:</h3>

a) This is kinematics exercise, write the equation of each vehicle car is;-

x = x₀ + v₀ t + ½ a t²

Let's fix our the reference system at a point where the car indicate that the car stops from rest is vo = 0.

x₀ = v₀ = 0

<h3>we substitute</h3>

x = ½ a t²

truck

x₂= v₀ t

v₀ = 15.4 m / s

At the point where they are, positions are equal:-

½ a t² = vo t

t = 2 vo / a

calculate us

t = 2 15.4 / 2.

t = 11.407 s

b) the distance to reach it

x = ½ to t²

x = ½ 20 11.407²

x = 175.66 m

c) the speed of the car is

v = vo + a t

vo = 0

v = at

v = 2.0 11.407

v = 30.80 m / s

To know more about acceleration visit:-

brainly.com/question/12550364

#SPJ4

7 0

1 year ago

Explain why wedges and screws are actually types of inclined planes.

slava [35]

<span>The screw is really just an inclined plane covered around with a tiny pole. The wedge is definitely an inclined plane, since it starts with a point, then rises getting thicker, as an inclined plane. </span>

5 0

4 years ago

Read 2 more answers

Muscles covert chemicals energy int

Elza [17]

Answer:

Mechanical energy

Explanation:

Mechanical energy is needed for movement of objects. Muscles convert chemical energy provided by the rest of the body to allow movement.

8 0

3 years ago

What is tensile stress?

Rasek [7]

Tensile strength is the amount of tension a material can hold, at least I hope that’s what it is.

5 0

4 years ago

We can reasonably model a 90-W incandescent lightbulb as a sphere 5.7 cm in diameter. Typically, only about 5% of the energy goe

o-na [289]

Answer:

See answer

Explanation:

Given quantities:

$\eta = 0.05\\ W=90[W]\\r=0.0285[m]$

where $\eta$ is the efficiency of the lightbulb (visible light is 5% of the total power), $W$ is the total power of the lightbulb, r is the radius of the lightbulb in meters.

Intensity is power divided by area:

$I =\frac{P}{A}$

a) Now the effective power is $\eta*W$ , therefore:

$I =\frac{\eta*W}{\pi r^2}=\frac{0.05*90}{4\pi (0.0285)^2}=440.87[W/m^2]$

b) Now the intensity is the average poynting vector is related to the magnitudes of the maximum electric field and magnetic field amplitudes, following:

$S_{average}= \frac{EB}{2\mu_{0}}[W/m]$