Answer:
The final velocity of the hockey puck = 10.53 m/s
Explanation:
Impulse: Impulse of a body is defined as the product of Force of a body and the time. Or it can also be defined as the product of the mass of a body and its change in velocity. The S.I units of impulse are, Ns or kgm/s.
Mathematically, impulse can be represented as,
I = m(v-u)
making v the subject of formula in the equation above,
v = (I/m)+u...................... Equation 1
Where I = impulse of a body, m = mass of the body, u = initial velocity of the body, v = final velocity of the body.
Given: I = 14.4 kgm/s, m = 4.6 kg, u = 7.4 m/s.
Substituting these values into equation 1
v = (14.4/4.6)+7.4
v = 3.13 + 7.4
v = 10.53 m/s
Therefore the final velocity of the hockey puck = 10.53 m/s
