- #1
werson tan
- 183
- 1
Homework Statement
A motorcycels accelerates at 1.6m/s^2 to reach a velocity of 20m/s of distance 50m . Determine the initial velocity and time elapsed .
Homework Equations
The Attempt at a Solution
to find the velocity , i have 2(1.6)(50) = (20^2)- (u^2) , u = 15.5m/s
but i have problem of finding the time ,
why i can't use the eq of s= ut +1/2(a)(t^2) ,
50 = 0+1/2(1.6)(t^2) , t= 8s ,
50 = 15.5(1) +1/2(1.6)(t^2) , t= 6.56s
the given time = 2.8s