Question

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

Answer 1

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

2

KE = mv2

2

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

2

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

2

KE = 1200 kg * 400 m2/s2

2

KE = 480,000 kg*m2/s2

2

KE = 240,000 kg m2/s2

or

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

2

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

2

KE = 1200 kg * 1600 m2/s2

2

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

2

KE = 960,000 kg m2/s2

or

960,000 J

Answer 2

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