Homework Answers
(B) The driver must make the car travel in a circle (or in a straight line with a = 0).
option a and b both are correct
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Why is part b wrong?
(a) How can a driver steer a car traveling at constant...
A car is traveling north along a straight road with a constant speed of 11.2 m/s....
A car is traveling north along a straight road with a constant speed of 11.2 m/s. In order to pass through an intersection before the traffic light turns red, the driver accelerates forward with a constant magnitude of 2.25 m/s2 for 3.70 s. A)What is v0? B) What is a? C)What is t? D) What is the velocity of the car at the end of the acceleration? E)What is the position of the car at the end of the acceleration?...
The driver of a car traveling on the highway suddenly slams on the brakes because of...
The driver of a car traveling on the highway suddenly slams on the brakes because of a slowdown in traffic ahead. A) If the car’s speed decreases at a constant rate from 74 mi/h to 50 mi/h in 3.0 s, what is the magnitude of its acceleration, assuming that it continues to move in a straight line? Answer is in mi/h^2 B) What distance does the car travel during the braking period? Answer is in ft
Problem 2: A particle is traveling with uniform (constant) speed, v. Answer the following questions carefully...
Problem 2: A particle is traveling with uniform (constant) speed, v. Answer the following questions carefully a. If the particle is traveling along a straight line path, with this constant speed, what is the magnitude of its acceleration vector? What is the direction of the acceleration vector? b. If the particle is traveling along a circular path of radius of curvature, p. what is the magnitude of the acceleration vector? What is the direction of the acceleration vector? Why is...
A car goes around an icy banked curve (frictionless) at a speed that is not too...
A car goes around an icy banked curve (frictionless) at a speed that is not too fast so that the car stays on the circula path. What causes the car to follow the circular path? A car goes around an icy banked curve (frictionless) at a speed that is not too fast so that the car stays on the circula path. What causes the car to follow the circular path? the normal force from the road gravity the friction force...
Suppose you are driving a car in a counterclockwise direction on a circular road whose radius...
Suppose you are driving a car in a counterclockwise direction on a circular road whose radius is r 28 m/s (about 63 mi/h) 385 m (see the figure). You look at the speedometer and it reads a steady T(decreasing) (a) Constant angular speed (b) Decreasing angular speed Concepts (i) Does an object traveling at a constant tangential speed (for example, vT= 28 m/s) along a circular path have an acceleration? Yes No (ii) Is there a tangential acceleration aT when...
A police car is traveling in a straight line with a constant speed "Vp". A truck...
A police car is traveling in a straight line with a constant speed "Vp". A truck traveling in the same direction with the speed "3*Vp/2" passes the police car. The truck begins to slow down (the moment it passes the police car) at a constant acceleration of "-a" until it comes to a stop. Then the police car passes the truck. What is the maximum velocity the truck can have, so that the police car will reach him before he...
11.78 A car is traveling at a constant speed of 54 km/h when its driver sees...
11.78 A car is traveling at a constant speed of 54 km/h when its driver sees a child run into the road. The driver applies her brakes until the child returns to the sidewalk and then accelerates to resume her original speed of 54 km/h; the acceleration record of the car is shown in the figure. Assuming x = 0) when t = 0, determine (a) the time t, at which the velocity is again 54 km/h, (b) the position...
Traveling Car Puntos:2 A car travels a certain distance along a straight road (in the +x...
Traveling Car Puntos:2 A car travels a certain distance along a straight road (in the +x direction). The distance the car travels as a function of time is shown in the figure below. When the car changes speed it does so uniformly. Select the appropriate choice for each statement 2000 800 600 400 200 20 40 60 80 Time (s) Less tha Greater than Equal to Greater than Equal to At 79 sec, the speed is as high as it...
A car is 162 m from a stop sign and traveling toward the sign at 27...
A car is 162 m from a stop sign and traveling toward the sign at 27 m/s. At this time, the driver suddenly realizes that she must stop the car. If it takes 0.200 s for the driver to apply the brakes, what must be the magnitude of the constant acceleration of the car after the brakes are applied so that the car will come to rest at the stop sign?
A car is 137 m from a stop sign and traveling toward the sign at 25...
A car is 137 m from a stop sign and traveling toward the sign at 25 m/s. At this time, the driver suddenly realizes that she must stop the car. If it takes 0.200 s for the driver to apply the brakes, what must be the magnitude of the constant acceleration of the car after the brakes are applied so that the car will come to rest at the stop sign?
Problem 2: A particle is traveling with uniform (constant) speed, v. Answer the following questions carefully a. If the particle is traveling along a straight line path, with this constant speed, what is the magnitude of its acceleration vector? What is the direction of the acceleration vector? b. If the particle is traveling along a circular path of radius of curvature, p. what is the magnitude of the acceleration vector? What is the direction of the acceleration vector? Why is...
Suppose you are driving a car in a counterclockwise direction on a circular road whose radius is r 28 m/s (about 63 mi/h) 385 m (see the figure). You look at the speedometer and it reads a steady T(decreasing) (a) Constant angular speed (b) Decreasing angular speed Concepts (i) Does an object traveling at a constant tangential speed (for example, vT= 28 m/s) along a circular path have an acceleration? Yes No (ii) Is there a tangential acceleration aT when...
11.78 A car is traveling at a constant speed of 54 km/h when its driver sees a child run into the road. The driver applies her brakes until the child returns to the sidewalk and then accelerates to resume her original speed of 54 km/h; the acceleration record of the car is shown in the figure. Assuming x = 0) when t = 0, determine (a) the time t, at which the velocity is again 54 km/h, (b) the position...
Traveling Car Puntos:2 A car travels a certain distance along a straight road (in the +x direction). The distance the car travels as a function of time is shown in the figure below. When the car changes speed it does so uniformly. Select the appropriate choice for each statement 2000 800 600 400 200 20 40 60 80 Time (s) Less tha Greater than Equal to Greater than Equal to At 79 sec, the speed is as high as it...
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