An object is moving so that its kinetic energy

Question

is 198 J and the magnitude of its momentum
is 13
.
1 kg
·
m
/
s.
Determine the speed of the object.
Answer in units of m
/
s.

Answer 1

Eq1:0.5M*V^2 = 198 J.

Eq2: M*V = 13
M = 13/V

In Eq1, replace M with 13/V:
0.5*(13/V)*V^2 = 198
6.5*V = 198
V = 30.5 m/s.