1 An aeroplane of mass 2.5 x 105kg lands with a speed of 62 m/s, on a horizontal runway at time
t = 0. The aeroplane decelerates uniformly as it travels along the runway in a straight line until it
reaches a speed of 6.0 m/s at t = 35 s.
(a) Calculate:
(i) the deceleration of the aeroplane in the 35 s after it lands

Consider two less-than-desirable options. in the first you are driving 30 mph and crash head-on into an identical car also going 30 mph. in the second option you are driving 30 mph and crash head-on into a stationary brick wall. in neither case does your car bounce off the thing it hits, and the collision time is the same in both cases. which of these two situations would result in the greatest impact force?