chris215 one year ago -

1. anonymous

you can solve this using kinematics for an uniform acceleration: $$x=v_0t+\frac{1}{2}at^2$$ the final position here is $$x=60m$$ the values for acceleration and initial speed are also given in the problem...

2. asib1214

Given: average velocity= -7.5m/s/s, d=60m, initial velocity= 108km/h, final velocity=N/A, Time=? Always remember this rule, the variable NOT/ N/A given to you is the formula your gunna use to figure out time. In this case it's gunna be d=Vi X t + 1/2 average velocity X t^2. Solve for T and your good to go.

3. Michele_Laino

here we have to apply this equation: $\Large 0 = {v_0} - at$ where t is the requested time, v_0=108 Km/hours= 30 meters/second, and a=7.5 meters/second