A puppy has 245 J of KE. It has a velocity of 7 m/s. What is it’s mass? Question A puppy has 245 J of KE. It has a velocity of 7 m/s. What is it’s mass? in progress 0 Physics Hồng Cúc 3 months 2021-08-01T14:01:34+00:00 2021-08-01T14:01:34+00:00 1 Answers 0 views 0

## Answers ( )

Answer: 10kg

Explanation:

Given that:

Kinetic energy of puppy = 245J

Velocity of puppy = 7 m/s

mass of puppy = ?

Recall that kinetic energy is the energy possessed by a moving body. It is measured in joules, and depends on the mass and velocity of the moving body

i.e K.E = 1/2 x mass x (velocity)^2

245J = 1/2 x mass x (7 m/s)^2

245 = 0.5 x mass x 49

245 = 24.5 x mass

Mass = 245/24.5

Mass = 10kg

Thus, the mass of the puppy is 10kg