*11. mmh The earth moves around the sun in a nearly circular orbit of ra-dius 1.50 x 10" m. During the three summer months (an elapsed time of7.89 x 10° s), the earth moves one-fourth of the distance around the sun.(a) What is the average speed of the earth? (b) What is the magnitude ofthe average velocity of the earth during this period?

Answered: *11. mmh The earth moves around the sun…

Inquiry into Physics

8th Edition

ISBN:9781337515863

Author:Ostdiek

Publisher:Ostdiek

Chapter1: The Study Of Motion

Section: Chapter Questions

Problem 8C: A race car starts from rest on a circular track with radius 100 m and begins to increase its speed...

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A car initially traveling eastward turns north by traveling in a circular path at uniform speed as shown in Figure P7.15. The length of the arc ABC is 235 m, and the car completes the turn in 36.0 s. (a) Determine the cars speed. (b) What is the magnitude and direction of the acceleration when the car is at point B? Figure P7.15
Does a car moving around a circular track with constant speed have (a) zero acceleration, (b) an acceleration in the direction of its velocity, (c) an acceleration directed away from the center of its path, (d) an acceleration directed toward the center of its path, or (e) an acceleration with a direction that cannot be determined from the given information?
A race car starts from rest on a circular track with radius 100 m and begins to increase its speed by m/s each second. At what point in time is the car's vector acceleration directed 45° away from straight ahead? What is the magnitude of the resultant acceleration at that moment?
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The earth moves around the sun in a nearly circular orbit of radius 1.50 x 1011 m. During the three summer months (an elapsed time of 7.89 x 106 s), the earth moves one-fourth of the distance around the sun. (a) What is the average speed of the earth? (b) What is the magnitude of the average velocity of the earth during this period?
A sprinter running on a circular track has a velocity of constant magnitude 9.20 m/s and a centripetal acceleration of magnitude 3.80 m/s2.What are (a) the track radius and (b) the period of the circular motion?
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6. The speed of a particle moving in a circle of radius 2.0 m increases its speed constantly at a rate of 4.4 m / s2. At an instant when the magnitude of the total acceleration is 6.0 m / s2, what is the velocity of the particle? choose an answer A B C D E 3.9 m/s 2.9 m/s 3.5 m/s 3.0 m/s 1.4 m/s
Formula One race cars are capable of remarkable accelerations when speeding up, slowing down, and turning corners. At one track, cars round a corner that is a segment of a circle of radius 95 m at a speed of 68 m/s. What is the approximate magnitude of the centripetal acceleration, in units of g? A. 18 B.28 C. 38 D.48 E.58
4. A car has an increasing speed at rate of 1.5m/s2 as it rounds a curve. What is the radius of curvature at a point when the speed of the car is 60kph and the magnitude of the total acceleration is 4m/s2? a. 65m b. 69m c. 75m d. 81m
Formula One race cars are capable of remarkable accelerations when speeding up, slowing down, and turning corners. At one track, cars round a corner that is a segment of a circle of radius 95 m at a speed of 68 m/s. What is the approximate magnitude of the centripetal acceleration, in units of g?A. 1g B. 2g C. 3g D. 4g E. 5g
A particle travels in a circular orbit of radius r = 127.9 meters. Where it's speed is changing at a rate of at=11.8 at an instant when it's speed is at v = 33.6 m/s. What is the expression for the magnitude a of the total acceleration of the particle in terms of the variables from the problem statement? a = ?

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