1. Two cars are traveling at the same constant speed v. As the drawing above indicates, car A ismoving along a straight section of the road, while car B is rounding a circular turn. Which statementis true about the accelerations of the cars?BAa. The acceleration of both cars is zero, since they are traveling at a constant speed.b. Car A is accelerating, but car B is not accelerating.c. Car A is not accelerating, but car B is accelerating.d. Both cars are accelerating.

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Answered: 1. Two cars are traveling at the same…

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter7: Rotational Motion And The Law Of Gravity

Section: Chapter Questions

Problem 15P: A car initially traveling eastward turns north by traveling in a circular path at uniform speed as...

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A child is practicing for a BMX race. His speed remains constant as he goes counterclockwise around a level track with two nearly straight sections and two nearly semicircular sections, as shown in the aerial view of Figure CQ7.12. (a) What are the directions of his velocity at points A, B, and C? For each point, choose one: north, south, east, west, or nonexistent, (b) What are the directions of his acceleration at points A, B, and C? Figure CQ7.12
A spoils car is advertised to have a maximum cornering acceleration of 0.85 g. (a) What is the maximum speed that the car can go around a curve with a 100-m radius? (b) What is its maximum speed for a 50-m radius curve? (c) If wet pavement reduces its maximum cornering acceleration to 0.6 g, what do the answers to (a) and (b) become?
An astronaut on the surface of the Moon fires a cannon to launch an experiment package, which leaves the barrel moving horizontally. Assume the free-fall acceleration on the Moon is one-sixth of that on the Earth. (a) What must the muzzle speed of the package be so that it travels completely around the Moon and returns to its original location? (b) What time interval does this trip around the Moon require?
An express train passes through a station. It enters with an initial velocity of 22.0 m/s and decelerates at a rate of 0.150 m/s2 as it goes through. The station is 210 m long. (a) How long is the nose of the train in the station? (b) How fast is it going when the nose leaves the station? (c) If the train is 130 m long, when does the end of the train leave the station? (d) What is the velocity of the end of the train as it leaves?
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A car moves around a path which is circular. Its speed is constant. Which of the following is TRUE? Select one: a. The car’s acceleration is zero. b. The car’s acceleration is constant. c. The car’s velocity is constant. d. The car’s velocity is directed toward the center.
2. A car enters a 350 m radius curve at a speed of 50 kph. If it accelerates at 2m/s^2, find its total acceleration (in m/s^2) when it has traveled 320 m along the curve? a. 4 b. 6 C. 5 CAR d. 7
2. A girl jogs around a horizontal circle with a constant speed. She travels one half of a revolution, a distance of 20.0 m along the circumference of the circle, in 8.00 s. a. What is the radius of the circle in meters? b. What is the period? c. What is her speed? d. What is her radial acceleration is?
A car travels around an oval racetrack at constant speed. The car is accelerating A. a. at all points except A, B, C, and D. b. at all points except A and C. C. nowhere, because it is travelling at constant speed. d. at all points except B and D. O e. everywhere, including points A, B, C, and D.
Pls. answer number 1-3.
1. A car starts from position A (0m) and drives in a straight line to position B (20m away from A) in 10 seconds. What is the average speed? Average velocity? 2. A car starts from position A (0m) and drives in a curved line to position B (20m away from A) in 10 seconds. Which is greater, average speed or average velocity? Explain. 3. If a person walks one time around in a circle that has a circumference of 100m in 60seconds, what is the distance traveled? Displacement? 4. In the same situation as above in question 3, what is the average speed? Average velocity?
4. A bullet fired horizontally from a gun is travelling at 250 m/s. The velocity of the bullet at any time t, in seconds, can be represented by v(t)=250-2t³. Assume the bullet is affected by air resistance but not gravity. How long will the bullet be in the air before it stops due to air resistance? a. b. How far will the bullet travel before it stops? Record your answer as an exact value.

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