oured vehicle P is 200 m behind another armoured vehicle Q. Both vehicles are travelling in
same direction at 144 km-h1, as shown in the diagram below.
P
200 m
Vehicle Q detonates a landmine, which explodes and stops the vehicle at that point. The driver a
vehicle P takes 1,0 s before he/she brakes and the vehicle starts to slow
down, which it doe
uniformly at 5 mes-2.
Take to the right as the positive direction.
4.1
Explain why 5 m-s2 is regarded as negative acceleration.
(2)
4.2.
Show that 144 km.h*1 = 40 m-s*1.
(2
4.3
Calculate the:
4.3.1 Distance (in m) travelled by vehicle P in the 1,0 s reaction time
4.3.2
Time from the instant the brakes are applied until vehicle P comes to rest
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