Answer to Question #971 in Mechanics | Relativity for Nate
a. what is the momentum of the ball at the highest point of its path?
b. what is its momentum halfway up?
c. what is its kinetic energy halfway up?
v2/4g = vt - gt2/2;
4.56 = 13.5t - 5t2;
t1 = 0.4 s; t2 = 2.3 s.
v(t=0.4) = v-gt = 13.5 - 0.4*10 = 9.5 m/s.
The momentum is p= 0.345* 9.5 = 3.3 kg* m/s;
The energy is E = mv2/2 = 0.345* 9.52 / 2 = 6.2 J
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