1)A projectile is launched from Earths surface at 7.2 km/s. At the top of its trajectory its...
Question:
1)A projectile is launched from Earth’s surface at 7.2 km/s. At the top of its trajectory its speed is 1.1 km/s. What is its height (in km) at this time?
2)The 4.9 m long ropes of a swing make an initial angle of 12.2 degrees with respect to the vertical at the highest point in the motion of a 40 kg mass child, Alice. A second child, Bobby, pushes Alice each time she reaches him, at her highest point, doing 32.6 J of work. What angle (in degrees) will Alice's swing ropes make after 5 swings?
3)
In this three part question worth a total of 20 marks, you will determine the energy required to launch a 700.0 kg satellite from Cape Canaveral (28.5 degrees latitude) into a geosynchronous orbit above the Earth.
PART 1: (3 marks)
A geosynchronous orbit has a period of about 24 hours, so that a satellite places there will appear motionless (hovering in the sky) to an observer on the surface of the Earth. A geosynchronous orbit has a radius of
km
PART 2: (8 marks)
On the launchpad, the launch rocket has an initial velocity of
m/s. (NOTE: this answer is not zero!)
PART 3: (9 marks)
The energy required to place the satellite in this orbit is
MJ
(Note-the answer should be provided in MegaJoules)
Vector Mechanics for Engineers Statics and Dynamics
ISBN: 978-0073212227
8th Edition
Authors: Ferdinand Beer, E. Russell Johnston, Jr., Elliot Eisenberg, William Clausen, David Mazurek, Phillip Cornwell