A cement block accidentally falls from rest from the ledge of a 80.3 -m-high bui

Question

A cement block accidentally falls from rest from the ledge of a 80.3 -m-high building. When the block is 13.2 m above the ground, a man, 1.90 m tall, looks up and notices that the block is directly above him. How much time, at most, does the man have to get out of the way? A bus makes a trip according to the position-time graph shown in the drawing. What is the average velocity (magnitude and direction) of the bus during (a) segments, (b) segment B, and (c) segment C? Express your answers in km/h. Review Interactive LearningWare 2.2 in preparation for this problem. A police car is traveling at a velocity of 18.0 m/s due north, when a car zooms by at a constant velocity of 41.0 m/s due north. After a reaction time 0.800 s the policeman begins to pursue the speeder with an acceleration of 6.00 m/sA2. Including the reaction time, how long does it take for the police car to catch up with the speeder?

Explanation / Answer

1) 0.299 seconds

2) A) 20 km/hr (in backward direction)

B) 10 km/hr (in forward direction)

C) 40 km/hr (in forward direction)

3) 9.69 seconds

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