- #1
r-soy
- 172
- 1
A truck covers 80 m in 17 s while smoothly slowing down to a final speed of 5.6 m/s
a ) find its original speed
b) Final its acceleration
I want check my answer :
a )
Dx = 80 m
t = 17 s
v = 5.6 m/s
v0= ??
by appling the rule
Dx = 1/2(v+v0)t
80 = 1/2(5.6 + v0) 17
v0 = .5 X 80 - 5.6 /17
=2.023 m/s
-------------
b)
v = v0 + at
5.6 = 2.023 + 17a
a = 5.6 -2.023/17 = 0.214
plese help me and wha thw unit of a will be ?
a ) find its original speed
b) Final its acceleration
I want check my answer :
a )
Dx = 80 m
t = 17 s
v = 5.6 m/s
v0= ??
by appling the rule
Dx = 1/2(v+v0)t
80 = 1/2(5.6 + v0) 17
v0 = .5 X 80 - 5.6 /17
=2.023 m/s
-------------
b)
v = v0 + at
5.6 = 2.023 + 17a
a = 5.6 -2.023/17 = 0.214
plese help me and wha thw unit of a will be ?