Question

A block slides down a frictionless plane having an inclination of θ = 13.2°. The block starts from rest at the top, and the length of the incline is 1.70 m.
-> Find the acceleration of the block.
(m/s2 down the incline)

-> Find its speed when it reaches the bottom of the incline.
m/s)

Answer 1

weight ccomponent down slope
F = m g sin 13.2
so
m g sin 13.2 = m a
so
a = 9.81 sin 13.2
( what else is new?)

d = (1/2) a t^2
1.7 = (1/2) a t^2
solve for t
then
v = a t