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4 years ago

Explain why not everyone can become a bodybuilder, even if they train hard enough.

Physics

1 answer:

Anni [7]4 years ago

5 0

People have diffrent body builds and bone structure

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The lower the value of the coefficient of friction,the_the resistance to sliding

malfutka [58]

Answer:

lower

Explanation:

The lower the value of the coefficient of friction, the lower the resistance to sliding.

The coefficient of friction is the ratio of the frictional force and the normal force pressing two surfaces in contact together.

U = $\frac{F}{N}$

U is the coefficient of friction

F is the frictional force

N is the normal force

We see that coefficient of friction is directly proportional to frictional force.

7 0

3 years ago

A locomotive approaches its next stop and accelerates at -0.12 m/s^2, coming to a complete stop in 30 seconds. This motion could

Masja [62]

Answer:

Answer: positive velocity & negative acceleration

Explanation:

Accelerated Motion

Both the velocity and acceleration are vectors because they have magnitude and direction. When the motion is restricted to one dimension, i.e. left-right or up-down, the direction is marked with the sign according to some preset reference.

The locomotive is moving at a certain speed with a (so far) unknown sign but the acceleration has a negative sign. Since the locomotive comes to a complete stop it means the velocity and the acceleration are of opposite signs.

Thus the velocity is positive.

Answer: positive velocity & negative acceleration

4 0

3 years ago

which of these is not a physical property of matter? select one: a. flammability b. color c. hardness d. density

netineya [11]

I believe the answer your looking for is A. Flammability. Because flammability is a chemical property, not a physical one. Hope this helps :)

6 0

3 years ago

The total weight of a car with passengers is 30,000N. The area of contact of each of the four tyres with the ground is 0.025m2.

vlabodo [156]

Answer:

The minimum pressure car tire pressure is 300,000 Pa

Explanation:

Pressure

It's a measure of the force exerted by an object per unit surface:

$\displaystyle P=\frac{F}{A}$

Where F is the force applied on a surface area A.

We are given the total weight of a car with passengers as Ft=30,000 N and we also know the area of contact of each tire with the ground as $A=0.025 m^2$ .

The minimum pressure each tire can have is when the total weight is evenly distributed in all four tires, thus F=Ft/4=7,500 N.

Calculating the pressure:

$\displaystyle P=\frac{7,500}{0.025}$

P=300,000 Pa

The minimum pressure car tire pressure is 300,000 Pa

7 0

3 years ago

- Which of the following cannot be a unit for work? A. Joule B. N.m C. Kilowatt D. All

shusha [124]

Answer:

joule

Explanation:

is for work it is also repreasent by SI

4 0

3 years ago