1. The car stops at the traffic light. It then moves along a straight path so that its distance from the light is given by x(t) = bt² – ct³, where b = 2.40 and c = 0.120. a) Determine the car's instantaneous velocity at t = 5s and t = 10s. b) How long after starting from rest is the car again at rest.

Physics for Scientists and Engineers
10th Edition
ISBN:9781337553278
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter2: Motion In One Dimension
Section: Chapter Questions
Problem 15P: A parcel of air moving in a straight tube with a constant acceleration of 4.00 m/s2 has a velocity...
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1. The car stops at the traffic light. It then moves along a straight path so that its distance
from the light is given by x(t) = bt? – ct³, where b = 2.40, and c = 0.120. a) Determine
the car's instantaneous velocity at t = 5s and t = 10s. b) How long after starting from rest is
the car again at rest.
2. A blue car is moving at a constant speed of 70 m/s when it passes signage with a police
officer beside it. Due to the car's over speeding, the police officer chases it with a constant
acceleration of 4 m/s², one second after the car passes the signage. How long does it the
police officer to overtake the truck?
Transcribed Image Text:1. The car stops at the traffic light. It then moves along a straight path so that its distance from the light is given by x(t) = bt? – ct³, where b = 2.40, and c = 0.120. a) Determine the car's instantaneous velocity at t = 5s and t = 10s. b) How long after starting from rest is the car again at rest. 2. A blue car is moving at a constant speed of 70 m/s when it passes signage with a police officer beside it. Due to the car's over speeding, the police officer chases it with a constant acceleration of 4 m/s², one second after the car passes the signage. How long does it the police officer to overtake the truck?
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