Physics, 25.08.2019 21:30 shannongray23402
Apolice officer at rest at side of highway notices speeder moving at 62 km/h along road. when speeder passes ,officer accelerates 3.0 m/s^2 in pursuit. speeder do not notice until police catch up.
a) how long will it take for the officer to catch the speeder
b) calculate the speed of the police officer when he catches the speeder, is this reasonable?
c) now assume that the police fficer accelerates until the police car is moving 10 km/h faster than the speeder and then moves at a constant velocity until the car catches up to the speeder. how long will it take to catch the speeder?
Answers: 1
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In an old-fashioned amusement park ride, passengers stand inside a 3.0-m-tall, 5.0-m-diameter hollow steel cylinder with their backs against the wall. the cylinder begins to rotate about a vertical axis. then the floor on which the passengers are standing suddenly drops away! if all goes well, the passengers will โstickโ to the wall and not slide. clothing has a static coefficient of friction against steel in the range 0.60 to 1.0 and a kinetic coefficient in the range 0.40 to 0.70. part a what is the minimum rotational frequency, in rpm, for which the ride is safe? express your answer using two significant figures. f f = rpm
Answers: 1
Apolice officer at rest at side of highway notices speeder moving at 62 km/h along road. when speede...
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