1. A car has an initial speed of 15 ms-1 when a truck rolls out of a driveway 18 m ahead of it. The driver takes 0.35 s to react before applying the brakes. If the car is to just be able to stop before hitting the truck the deceleration of the car will be nearest to:
2.A rock is thrown vertically upwards with a velocity of 30 m.s-1 from the top of a 25 m high building. When it falls back down it just misses the building and falls to the ground. The acceleration due to gravity is 9.8 m.s?2. Find the nearest total time of flight of the rock
You could find the time taken to reach maximum height, then calculate this heightand find the
time taken to fall back to the ground, adding these two times gives thetotal time of
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