1-
F = mgsin30 = 0.5 *9.81 *0.5 = 2.45 N
2-
N = mg cos30 = 0.5*9.81* cos30 = 4.25 N
3-
v^2 = 0 + 2 a x
a = F / m = 2.45 / 0.5 = 4.9 m/s^2
v^2 = 0 + 2* 4.9* 1.6
v = 3.96 m/s
4-
v = 0 + a t
t = 3.96 / 4.9 = 0.8 sec
5-
w = m g h
h = 1.6 sin 30 = 0.8 m
w = 0.5*9.81 *0.8 = 3.92 Nm
6-
v^2 = 0 + 2 a x
4 = 2 * 4.9 * x
x = 0.4 m
y = (1.6 - 0.4) sin30
y = 0.6 m
p.e = m g y = 0.5 *9.81 *0.6 = 2.94 Nm
7-
y = 0.5 m
x = 0.5/ sin30 = 1 m
v^2 = 0 + 2 a x
v^2 = 0 + 2* 4.9 *1
v = 3.13 m/s
s = 1.6 - 1 = 0.6 m