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2 years ago

Compare and contrast speed and velocity

1 answer:

8 0

Where speed is distance/time, velocity is displacement/time.

What this means is that velocity is the length covered in relation to the starting point.
Speed is just the distance travelled no matter where you began.

When going around a circular track, you might have a speed value. However, since you get back to the same location at every lap, you have 0 velocity.

Hope I helped :)

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g A cylinder of mass m is free to slide in a vertical tube. The kinetic friction force between the cylinder and the walls of the

sdas [7]

Answer:

The vertical distance is $d = \frac{2}{k} *[mg + f]$

Explanation:

From the question we are told that

The mass of the cylinder is m

The kinetic frictional force is f

Generally from the work energy theorem

$E = P + W_f$

Here E the the energy of the spring which is increasing and this is mathematically represented as

$E = \frac{1}{2} * k * d^2$

Here k is the spring constant

P is the potential energy of the cylinder which is mathematically represented as

$P = mgd$

And

$W_f$ is the workdone by friction which is mathematically represented as

$W_f = f * d$

$\frac{1}{2} * k * d^2 = mgd + f * d$

=> $\frac{1}{2} * k * d^2 = d[mg + f ]$

=> $\frac{1}{2} * k * d = [mg + f ]$

=> $d = \frac{2}{k} *[mg + f]$

5 0

3 years ago

The clothes washer in your house consumes 470 kWh of energy per year. Price of the washer is $360 and the lifetime of the washer

VashaNatasha [74]

Answer:

$893

Explanation: the complete question should be

The clothes washer in your house consumes 470 kWh of energy per year. Price of the washer is $360 and the lifetime of the washer is 10 yrs. Energy price in your city is 9 cents per kWh. What is the lifecycle cost of the clothes washer? (assume a maintenance cost of $11 per year)

SOLUTION

Given:

The clothes washe power consumption (PC) is 470 kWh

Price of the washer (P) is $360

lifetime of the washer (L) is 10 yrs

Energy price in the city (E) is 9 cents per kWh (Covert to $ by dividing 100)

maintenance cost (M) is $11 per year

Lifecycle cost = P + (PC × L × E) +M + L

Lifecycle cost = $360 + (470kWh × 10years × 9cents/100) + ($11 × 10years)

=$893

7 0

2 years ago

Why do racing cars have wider wheels?

tamaranim1 [39]

Answer:

So they can last longer and have more grip than normal on-road cars. They need that in order for them to run well

Explanation:

3 0

2 years ago

Read 2 more answers

PLEASE HELP!!! GIVING BRAINLIEST!! ill also answer questions that you have posted if you answer this correctly!!!! (40pts)

melisa1 [442]

D.)downward toward the center of earth

7 0

2 years ago

Atoms of the same element can have different properties.<br><br> A) True<br><br> B) False

vladimir2022 [97]

Answer:

False.

Explanation:

All atoms of the same element have the same number of protons, but some may have different numbers of neutrons.

6 0

2 years ago