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51. Phobos orbits Mars with an average distance of about 9380 km from the center of the planet and a rotational period of about 7hr 39 min. Use this information to estimate the mass of Mars.

52. Galileo is often credited with the early discovery of four of Jupiter's many moons. The moons orbiting Jupiter follow the same laws of motion as the planets orbiting the sun. One of the moons is called Io - its distance from Jupiter's center is 4.2 units and it orbits Jupiter in 1.8 Earth-days. Another moon is called Ganymede; it is 10.7 units from Jupiter's center. Make a prediction of the period of Ganymede using Kepler's law of harmonies.

53. Suppose a small planet is discovered that is 14 times as far from the sun as the Earth's distance is from the sun (1.5 x 1011 m). Use Kepler's law of harmonies to predict the orbital period of such a planet. GIVEN: T2/R3 = 2.97 x 10-19 s2/m3

54. The average orbital distance of Mars is 1.52 times the average orbital distance of the Earth. Knowing that the Earth orbits the sun in approximately 365 days, use Kepler's law of harmonies to predict the time for Mars to orbit the sun.

55. Kepler's third law says that a3/P2 is the same for all objects orbiting the Sun. Vesta is a minor planet (asteroid) that takes 3.63 years to orbit the Sun. Calculate the average Sun-Vesta distance.

56.Phobos orbits Mars with an average distance of about 9380 km (about 5720 miles) from the center of the planet and a rotational period of about 7 hr 39 min. Calculate the mass of Mars

57.-60.

http://www.physicsclassroom.com/class/circles/Lesson-4/Kepler-s-Three-Laws https://www.astro.umd.edu/~rhudson/ASTR380/documents/Kepler-F15-Examples.pdf

newtons
Find the acceleration of a 20 kg crate along a horizontal floor when it is pushed with a resultant force of 10 N parallel to the floor.

A 1kg stone fall freely from rest from a bridge.

What is the force causing it to accelerate? What is its speed 4s later? How far has it fallen in this time?

A lift with its load has a mass of 2000 kg. It is supported by a steel cable. Find the tension in he cable when it:

is at rest accelerates upwards uniformly at 1m/s2 move upwards at a steady speed of 1 m/s moves downwards at a steady speed of 1 m/s accelerates downwards with uniform acceleration of 1 m/s2

The 1.2kg mass will move downwards. The pulley and mass arrangement is as shown in Figure 2.3. Let the acceleration be a and the tension T.

Two blocks of masses 5 kg and 7 kg are placed in contact with each other on a frictionless horizontal surface. A constant horizontal force 20 N is applied to the block of mass 7 kg. (a) Determine the magnitude of the acceleration of the two-block system.

momentum10 wave anf req 10 forces 20
v. Momentum

A.Determine the momentum of a ...

61. 60-kg halfback moving eastward at 9 m/s.

62. 1000-kg car moving northward at 20 m/s.

63. 40-kg freshman moving southward at 2 m/s

64-67. Given: A car possesses 20 000 units of momentum. What would be the car's new momentum if ...

64. its velocity was doubled.

65. its velocity was tripled.

66. its mass was doubled (by adding more passengers and a greater load)

67. both its velocity was doubled and its mass was doubled.

68. If a 5-kg object experiences a 10-N force for a duration of 0.10-second, then what is the momentum change of the object?

69.Jennifer, who has a mass of 50.0 kg, is riding at 35.0 m/s in her red sports car when she must suddenly slam on the brakes to avoid hitting a deer crossing the road. She strikes the air bag, that brings her body to a stop in 0.500 s. What average force does the seat belt exert on her?

70. A 325 kg motorcycle is moving at 140 km/h, south. a) Find its momentum.    b) At what velocity is the momentum of a 1754 kg car equal to that of the motorcycle?

VI. Wavelength and Frequency

71. http://web.monroecc.edu/manila/webfiles/pgraham/PracticeProblems13Chanswerke.pdf.

VII. Forces http://www.edu.pe.ca/gray/class_pages/krcutcliffe/physics621/5%20forces/5%20forces%20example%20problems.htm http://www2.ignatius.edu/faculty/decarlo/force.htm http://www.physicsclassroom.com/class/vectors/Lesson-3/Net-Force-Problems-Revisited http://www.physicsclassroom.com/class/1DKin/Lesson-6/Sample-Problems-and-Solutions

http://www.physicsclassroom.com/class/momentum/Lesson-1/Momentum http://www.physicsclassroom.com/class/momentum/Lesson-1/Momentum-and-Impulse-Connection