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4 years ago

5

What is true about mechanical energy? a. An object with mechanical energy cannot do work. c. Mechanical energy is the energy tha

t an object has due to its position b. An object with mechanical energy can exert an applied force on another object. d. All of the above.

1 answer:

Mama L [17]4 years ago

7 0

I believe the correct answer is C all the other options seem funny to me

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Why are the orbits of planets only nearly circular and not perfectly circular?

Galina-37 [17]

Explanation:

this is my answer this is helpful for you

7 0

3 years ago

A car travels around a level, circular track that is 750m across. What coefficient of friction is required to ensure the car can

Crank

The coefficient of friction must be 0.196

Explanation:

For a car moving on a circular track, the frictional force provides the centripetal force needed to keep the car in circular motion. Therefore, we can write:

$\mu mg = m\frac{v^2}{r}$

where the term on the left is the frictional force acting between the tires of the car and the road, while the term on the right is the centripetal force. The various terms are:

$\mu$ is the coefficient of friction between the tires and the road

m is the mass of the car

$g=9.8 m/s^2$ is the acceleration of gravity

v is the speed of the car

r is the radius of the curve

In this problem,

r = 750 m is the radius

$v=85 mph \cdot \frac{1609}{3600}=38.0 m/s$ is the speed

And solving for $\mu$ , we find the coefficient of friction required to keep the car in circular motion:

$\mu = \frac{v^2}{rg}=\frac{38.0^2}{(750)(9.8)}=0.196$

Learn more about circular motion:

brainly.com/question/2562955

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#LearnwithBrainly

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3 years ago

ok this question is for y'all how do what is the coriolis effect and what do it produce and how and i know the answer

Fudgin [204]

Idk can u explain to me?

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4 years ago

An example of friction being converted into heat energy is A) the sun. B) a generator. C) a Snickers bar. D) rubbing your hands

padilas [110]

D.) Rubbing your hands together

Hope this helps! ( brainleist??)

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3 years ago

Read 2 more answers

A material that conducts electricity is called a... what?

jonny [76]

Answer:

Materials which do conduct electricity, like copper, are called conductors. In the middle are materials known as semiconductors, which don't conduct as well as conductors, but can carry current.

I hope it helped you...

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3 years ago