DONT ANSWER WITH A LINK PLEASE I NEED AN ANSWER FROM SOMEONE!
2 answers:
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
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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B. The speed and direction of an object in motion
3500/ 100 = 35
the answer is 35m!
Answer:
From 0 -4 seconds the acceleration is positive. (The graph is going upwards.)
From 6-10 seconds the acceleration is negative. (The graph is going downwards.)
Answer:

Explanation:
When two cars collide then the momentum of two cars will remains conserved
- Mass of two cars = 100 kg
-
Speed of car B = - 10 m/s
-
After collision the speed of car B = +8 m/s
By momentum conservation equation


I would think the answer would be c