A scientist wants to place a satellite into orbit around Earth. Take Earth's mass to be 5.975 1024kg and radius to be 6.371 106 m. (a) If the scientist wants the radius of the orbit to be 7 106 m:
i. What is the speed of the satellite?
ii. What is the period of the orbit?
(b) If the scientist wants the period of the orbit to be 1 day
i. What must the radius of the orbit be?
ii. What is the speed of this orbit?

1. jay fills a wagon with sand (about 20 kg) and pulls it with a rope 30 m along the beach. he holds the rope 25° above the horizontal. the rope exerts a 20-n tension force on the wagon. how much work does the rope do on the wagon?

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.

Amoving company collects data about couches they move and displays the data in a table. the force along the ramp, the angle of the ramp, and the height the couch is raised to are shown. which statements correctly compare the work done to move the couches? check all that apply. the same amount of work is done for couches 1 and 3. the same amount of work is done for couches 2 and 3. the work for couch 1 is greater than the work for couch 2. the work for couch 2 is less than the work for couch 3. the work for couch 3 is greater than the work for couch 1. the work for couch 2 is greater than the work for couch 1.