All categories

3 years ago

1. A 1,000-kg car has 50,000 joules of kinetic energy. What is its speed?

2 answers:

4 0

Use KE= 1/2mv^2
So...
50,000=(.5)(1,000)v^2
50,000=500 x v^2
Divide 500 on both sides
100 = v^2
Square root both sides to get rid of v^2
Therefore v = 10 m/s

Crank3 years ago

3 0

½mv²= KE

½(1000)?²= 50000

500*?²= 50000

/500 /500

? ²=100

Square root

?= 10

10 m/s is you answer

You might be interested in

As a moon follows its orbit around a planet, the maximum gravitational force exerted on the moon by the planet exceeds the minim

professor190 [17]

Answer:

rmax/rmin = √1.127

Explanation:

F = GmM / r²

As the masses can be assumed to be constant, the force between the two is proportional to the inverse of the square of the distance between them

(Fmax - Fmin) / Fmin = 0.127

(Fmax - Fmin) = 0.127Fmin

1/rmin² - 1/rmax² = 0.127(1/rmax²)

1/rmin² = 0.127(1/rmax²) + 1/rmax²

1/rmin² = 1.127(1/rmax²)

rmax²/rmin² = 1.127

rmax/rmin = √1.127 ≈ 1.06160256...

8 0

3 years ago

A well-trained athlete can run 400m in 47s, what is the athlete’s velocity?

AnnZ [28]

Answer:

8.51 m/s

Explanation:

Velocity = Displacement/Time

Velocity = 400 m ÷ 47 s

Velocity = 8.51 m/s

7 0

2 years ago

Click the Run Now button to start the simulations. Select "Many rays" and click the Screen checkbox. You should see a lamp and a

Gnoma [55]

Answer:

Answer explained below

Explanation:

(a) The rays are diverging near the lens. They change the direction when they passed through the converging lens

(b) If the light rays don't bend they will move away from the optical (principal axis) as the other waves are moving.

(c) If we decrease the distance between lens and light source, most of the rays diverge and no ray converges on the screen even after passing through the lens. Here is a screenshot.

5 0

3 years ago

Which statement compares the strengths of electric forces between particles of matter?

Black_prince [1.1K]

Answer:

B. Metallic bonds are stronger than hydrogen bonds but weaker than ionic bonds.

Explanation:

a p e x , just took the quiz

4 0

3 years ago

When you hear a noise, you usually know the direction from which it came even if you cannot see the source. This ability is part

adelina 88 [10]

Answer:

Check the explanation

Explanation:

Kindly check the attached image below to see the step by step explanation to the question above.

3 0

3 years ago