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3 years ago

DONT ANSWER WITH A LINK PLEASE I NEED AN ANSWER FROM SOMEONE!

Physics

2 answers:

lora16 [44]3 years ago

7 0

Answer:Forms of energy:

Kinetic energy

is the energy of motion.

Kinetic Energy (KE) depends on mass (m) and speed (v).

Kinetic Energy = mass x velocity2

KE = mv2

explanation; is just an explanation

What is the kinetic energy of a car that has a mass of 1200 kg and is moving at a speed of 20 m/s ?

KE = mv2

KE = 1200 kg * (20 m/s)2

KE = 1200 kg * 400 m2/s2

KE = 480,000 kg*m2/s2

KE = 240,000 kg m2/s2

240,000 J

How does the kinetic energy compare to the example problem above?

#3 What is the kinetic energy

of a car that has a mass of 1200 kg and is moving at a speed of 40 m/s ?

KE = mv2

KE = 1200 kg * (40 m/s)2

KE = 1200 kg * 1600 m2/s2

KE = 1,920,000 kg*m2/s2

KE = 960,000 kg m2/s2

960,000 J

rjkz [21]3 years ago

3 0

At 4 m/s?

How do the two kinetic energies compare to one another? QUADRUPLES !

#3 What is the kinetic energy of a 2,000 kg bus that is moving at 30 m/s?

Potential energy

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pickupchik [31]

The answer would be B ok man good luck

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3 years ago

Read 2 more answers

Select all correct statements below:

Dafna11 [192]

Answer:

Explanation:

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4 years ago

You measure the velocity of a drag racer that accelerates with constant acceleration. You want to plot the data and determine th

Ivenika [448]

Answer:

a) Linear equation

Explanation:

Definition of acceleration

$a=\frac{dv}{dt}\\$

if a=constant and we integrate the last equation

$v(t)=v_{o}+a*t$

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3 years ago

(a) How fast must a 3000-kg elephant move to have the same kinetic energy as a 65.0-kg sprinter running at 10.0 m/ s?

Aleksandr-060686 [28]

Answer:

1.4719 m per sec

Explanation:

Hello

Kinetic energy is the energy associated with the movement of objects. Although there are many forms of kinetic energy

the formula to use is

$E=\frac{mv^{2} }{2}$

where m is the mass of the object and v the velocity

lets see the kinetic energy of the sprinter running

$E=\frac{65 Kg*10(\frac{m}{s} ^)){2} }{2} \\\\E=\frac{65 *100 }{2} \\E=3250 Joules\\\\$

Now, the elephant must have the same kinetic energy

$E=\frac{m*v_{2} ^{2} }{2} \\\\E*2=m*v_{2} ^{2}\\ \frac{2E}{m} =v_{2} ^{2} \\\sqrt{\frac{2E}{m} } =v_{2} \\\\\\v_{2} =\sqrt{\frac{2*3250}{3000} }\\ \\v_{2} =1.4719 \frac{m}{s} \\\\$

it works only the positive root, so the elephant must to walk to 1.4719 m/s to have the same kinetic energy.

Have a great day

8 0

3 years ago

PLEASE HELP<br> The image characteristics are...

VLD [36.1K]

According to the question, the object is placed at 2F

The ray diagram is shown in the figure attached.

According to the figure:

Object AB is at 2F₁

First, we draw a ray parallel to principal axis.

So, it passes through focus after refraction.

We draw another ray which passes through optical center.

So, the ray will go through without any deviation.

Where both refracted rays meet is point A' and the image formed is A'B'

This image is formed at 2F₂

We can say that:

Image is real.
Image is inverted.
Image is exactly the same size as the object.

4 0

3 years ago