A puck of mass m=2 kg moves on a circle of radius r=0.5 meters, on a frictionless table. The puck is attached to an object of mass M=10 kg by a cord that extends through a hole on the table. Find the speed of the puck if the object is at rest. You may take g=10m/s². Select one: O a. 4/3m/s O b. 5/2m/s O c. 5m/s O d. 25m/s O e. 4m/s

A puck of mass m=2 kg moves on a circle of radius r=0.5 meters, on a frictionless table. The puck is attached to an object of mass M=10 kg by a cord that extends through a hole on the table. Find the speed of the puck if the object is at rest. You may take g=10m/s². Select one: O a. 4/3m/s O b. 5/2m/s O c. 5m/s O d. 25m/s O e. 4m/s

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter6: Applications Of Newton’s Laws Of Motion

Section: Chapter Questions

Problem 81PQ: Since March 2006, NASAs Mars Reconnaissance Orbiter (MRO) has been in a circular orbit at an...

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Since March 2006, NASAs Mars Reconnaissance Orbiter (MRO) has been in a circular orbit at an altitude of 316 km around Mars (Fig. P6.81). The acceleration due to gravity on the surface of the planet Mars is 0.376g, and its radius is 3.40 103 km. Assume the acceleration due to gravity at the satellite is the same as on the planets surface. a. What is MROs orbital speed? B. What is the period of the spacecrafts orbit? FIGURE P6.81
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A rocket with mass 7.00×103 kgkg is in a circular orbit of radius 7.50×106 mm around the earth. The rocket's engines fire for a period of time to increase that radius to 8.80×106 mm, with the orbit again circular. Part A What is the change in the rocket's kinetic energy? Does the kinetic energy increase or decrease? Express your answer with the appropriate units. Enter positive value if the kinetic energy increases and negative value if the kinetic energy decreases. ΔKΔK = nothingnothing SubmitRequest Answer Part B What is the change in the rocket's gravitational potential energy? Does the potential energy increase or decrease? Express your answer with the appropriate units. Enter positive value if the gravitational potential energy increases and negative value if the gravitational potential energy decreases. ΔUΔU = nothingnothing SubmitRequest Answer Part C How much work…
During the eclipse of the sun, the moon, the earth, and the sun lie in a straight line, so that the moon is between the earth and the sun. a. What is the power of the sun on the moon? b. What is the power that the Earth makes on the moon? c. How strong is the sun on Earth? , d. Compare the answers a and b. Why doesn't the sun catch the moon far from Earth? M(moon)= 7.36 x 10^22 kg M(earth) = 5.98 x 10^24 kg M(sun) = 1.99 x 10^30 kg (distance between Earth and the moon)= 3.84x10^8m (distance between the sun and the earth)= 1.496 x 10^11 m
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