The momentum of the body is 4.5 kg multiplied by m / s and the kinetic energy is 9 J, find the mass and velocity of the body.

To find the mass and velocity, we derive the velocity V = p / m from the formula for the momentum of the body, and substitute these values into the formula Ek = m * (p / m) ^ 2/2, and we get
9 = (m * 4.5 ^ 2 / m ^ 2) / 2 mass is decreasing
9 = (20.25 / m) / 2 = 20.25 / 2m translate 20.25 to 9
20.25 / 9 = 2m
2.25 = 2m
m = 1.125 (kg)
Now, to find the speed, we will use the formula v = p / m
V = 4.5 / 1.125 = 4 (m / s)
Answer:
m = 1.125 (kg)
V = 4 (m / s)