- #1
Rumplestiltskin
- 97
- 3
Homework Statement
A car passes through traffic lights as they turn from red to green at a speed of 12ms-1. A motorcyclist, starting from rest, accelerates from the traffic lights in the same direction as the car at 1.5ms-2. After what distance from the lights will they meet? (OPTIONS: 16m, 120m, 168m, 192m).
Homework Equations
The Attempt at a Solution
12t = d, and 1.5t2 = d.
12t = 1.5t2.
1.5t2 - 12t = 0.
t(1.5t -12) = 0.
t = 0 or 8.
12ms-1 * 8s = 96m. Not an option.