Answer:
See the answers below.
Explanation:
a)
The change in momentum can be calculated by means of the following equation.
[tex]P=m*v[/tex]
where:
P = momentum [kg*m/s]
m = mass = 45 [g] = 0.045 [kg]
v = velocity = 20 [m/s]
[tex]P=20*0.045\\P=0.9[kg*m/s][/tex]
b)
The change in momentum can also be calculated by means of the product of force by the duration time of the impact.
[tex]F*t=P\\F*0.006=0.9\\F=0.9/0.006\\F =150 [N][/tex]
