Answer:
F = 237 N
Explanation:
x(t) = 0.32sin(πt)
v(t) = 0.32πcos(πt)
a(t) = -0.32π²sin(πt)
a(1.5) = -0.32π²sin(π1.5) = 3.158... m/s²
F = ma = 75(3.158) = 236.870... N
The cart mark (a) has the most potential energy and the cart marked (b) has the most kinetic energy
0.049
0.098
0.147
0.196
1.2 kg
F = 18N
a = 15 m/s^2
F = ma
18 = 15m
m = 1.2 kg