A car traveling initially at 42 km/h on the entrance ramp of an expressway accelerates uniformly to 105 km/h in 26 s.
a) how far, in km, does the car travel over this time interval?
b) determine the magnitude of the average acceleration in (km/h)/s.

Question

A car traveling initially at 42 km/h on the entrance ramp of an expressway accelerates uniformly to 105 km/h in 26 s. 
a) how far, in km, does the car travel over this time interval? 
b) determine the magnitude of the average acceleration in (km/h)/s.

anonymous · Answer

They want the acceleration in (km/h)/s? Weird. 
Distance travelled
$$d = v_ot + {1 \over 2} at^2$$
Average acceleration$$\bar a = {v_f - v_i \over t}$$

anonymous · Answer

thank you