In a stunt scene for a new action movie a motorcyclist will, Ask an Expert

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In a stunt scene for a new action movie a motorcyclist will take off horizontally from the top of one building, travel across a gap and then land on the roof of a lower building next to it. The two buildings are separated horizontally by a gap of 12 m and the roof level of the lower building is 8 m below that of the first building.

a) If the motorcycle has just enough speed to make the jump safely, how long does it take for the motorcycle to make the jump between the two buildings?

b) What is the minimum horizontal take-off speed that the motorcycle must have to make the jump safely?

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