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3 years ago

Imagine that you pushed a box, applying a force of 60 newtons, over a distance of 4 meters. How much would you have done?

1 answer:

5 0

You would have done 240 joules of work on the box.

Work = (force) x (distance)

= (60 newtons) x (4 meters)

= 240 joules .

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PLEASE HELP ASAP!! Will give brainliest!! Which item is necessary to make an electromagnet?

vichka [17]

To make something electrical you need electricity and the wires will turn a magnet into an electromagnet.
or for a short answer: 1) soft iron core 2) coil of insulated wire 3)source of electricity

8 0

3 years ago

Determine the kinetic energy of a 2000 kg roller coaster car that is moving at the speed of 10 ms

kondaur [170]

Answer:

$\boxed {\boxed {\sf 100,000 \ Joules}}$

Explanation:

Kinetic energy is energy due to motion. The formula is half the product of mass and velocity squared.

$E_k= \frac{1}{2} mv^2$

The mass of the roller coaster car is 2000 kilograms and the car is moving 10 meters per second.

m= 2000 kg
s= 10 m/s

Substitute these values into the formula.

$E_k= \frac{1}{2} (2000 \ kg ) \times (10 \ m/s)^2$

Solve the exponent.

(10 m/s)²= 10 m/s * 10 m/s= 100 m²/s²

$E_k= \frac{1}{2} (2000 \ kg ) \times (100 \ m^2/s^2)$

Multiply the first two numbers together.

$E_k= 1000 \ kg \times (100 \ m^2/s^2)$

Multiply again.

$E_k= 100,000 \ kg*m^2/s^2$

1 kilogram square meter per square second is equal to 1 Joule.
Our answer of 100,000 kg*m²/s² is equal to 100,000 Joules.

$E_k= 100,000 \ J$

The roller coaster car has 100,000 Joules of kinetic energy.

3 0

2 years ago

Two rocks, A and B, are thrown horizontally from the top of a cliff. Rock A has an initial speed of 10 meters per second and roc

maria [59]

Answer:

i need help

Explanation:

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1 year ago

What did the scientist say to the hydrogen atom that claimed it lost an electron

lys-0071 [83]

Answer:

"Are you positive?"

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3 years ago

Read 2 more answers

When a transformer is step down then

Vera_Pavlovna [14]

Answer:

Hey!

Your answer should be D!

Explanation:

In a transformer Np / Ns is called the voltage ratio. If Ns is less than Np then Vs is less than Vp. This is called a step-down transformer as the voltage is reduced.

(source from google.com!)

3 0

2 years ago