james bond is standing on a bridge, 10m above a road below, and the pursuers are

Question

james bond is standing on a bridge, 10m above a road below, and the pursuers are getting too close for comfort. he spots a flat bed truck loaded with mattresses approaching at a constant speed of 30m/s (which he measured with his stop watch function on a wrist watch, and knowing that the telephone poles along the road are 20m apart in this locality). the top of the mattress is 1.5m above the road.

bond quickly mentally calculates how many poles away the truck should be when he should drop off the bridge and land safely. how many poles is it?

please explain well

Explanation / Answer

using h = ut + at^2/2

- 10 + 1.5 = 0 - 9.8t^2/2

t = 1.32 sec

d = 30 x 1.32 =39.50 m

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