Question

3. What is the Kinetic Energy of a 100 kg object that is moving with a speed of 12.5 m/s?

Answer 1

Answer:

7812.5 J

Step-by-step explanation:

Kinetic energy is equal to 1/2 m v^2.

The mass of the object is 100 and the velocity is 12.5 m/s.

Therefore, the kinetic energy is 1/2 (100) (12.5)^2 = 7812.5 J.

Answer 2

Answer:

KE = ½ (100kg) (12.5 m/s)2

KE = ½ (100kg)(156.25)

KE = 7,812.5J  

answer ^

Step-by-step explanation:

KE = ½ mv2

KE = ?

m = 100kg

v = 12.5m/s