0 of 10 Questions completed
Questions:
You have already completed the quiz before. Hence you can not start it again.
Quiz is loading…
You must sign in or sign up to start the quiz.
You must first complete the following:
0 of 10 Questions answered correctly
Your time:
Time has elapsed
You have reached 0 of 0 point(s), (0)
Earned Point(s): 0 of 0, (0)
0 Essay(s) Pending (Possible Point(s): 0)
Average score |
|
Your score |
|
Pos. | Name | Entered on | Points | Result |
---|---|---|---|---|
Table is loading | ||||
No data available | ||||
The diagram shows the Hubble space telescope in orbit around Earth at an altitude of 600 km.
(a) On the diagram, draw an arrow to show the direction of the centripetal force acting on the satellite. (1)
(b) The space shuttle (mass: 2 029 203 kg) is travelling with a speed of 7830 m s-1 in orbit 340 km above the Earth’s surface. The Earth has a radius of 6378 km. Ignoring any change in kinetic energy calculate the work done to move the shuttle into an orbit at the same altitude as the Hubble telescope. (3)
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
A star called 55 Cancri is 41 light years from the Earth. A light year is the distance light travels in one year.
In 1997, a Jupiter-sized planet was discovered orbiting in a nearly circular path of radius 0.1 AU around the star with an orbital period of 14.7 Earth days (1 AU is the 150 million kilometre distance from Earth to the Sun). The planet was called 55 Cancri b.
(a) Calculate the orbital velocity of 55 Cancri b. (2)
(b) In 2002, another planet, 55 Cancri d, was discovered in a circular orbit around the same star at a distance of 5.8 AU.
What is the ratio of the period of the new planet to the period of 55 Cancri b? (2)
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
Saturn has a moon called Tethys which has an orbital period of 1.9 days and an orbital radius of 295,000km. Calculate the mass of Saturn. (3)
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
A rocket launches a satellite into orbit 355 km above Earth’s surface. The weight of the
satellite is 14.0 kN at launch.
(Radius of Earth = 6380 km, mass of earth = 5.97 x 1024 kg)
(a) Calculate the gravitational field strength 355 km above the earth’s surface. (2)
(b) Calculate the orbital velocity of this satellite. (2)
(c) Calculate the work done to move the satellite from the launch pad to the orbit altitude. (3)
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
The earth orbits the sun with a period of approximately 365 days. The diagram shows the earth orbiting the sun, viewed from above the earth’s north pole.
(a) Draw labelled vectors on the diagram to show the net force (FN) acting on the earth, and the instantaneous velocity (v) of the earth at the position shown. (1)
(b) Calculate the distance between the earth and the sun (Msun = 2.0 x 1030 kg, Tearth = 365 days). (2)
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
Explain what is meant by the term ‘the escape velocity at the surface of the Earth’ and calculate its value. (3)
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
A projectile of mass 1150 kg is fired vertically from the surface of an asteroid of
mass 1.1×1020 kg and radius 2.6×106 m with a speed of 50 ms-1.
(a) Determine the initial kinetic energy of the projectile. (1)
(b) Determine the initial gravitational potential energy of the projectile. (1)
(c) Determine the maximum distance the projectile reaches from the centre of the asteroid. (2)
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
A satellite of mass 1200 kg is in orbit around the Earth at a distance of 22000 km
from the centre of the Earth.
(a) Calculate the magnitude of the centripetal acceleration of the satellite at this distance. (1)
(b) Determine the period of the satellite. (2)
(c) Explain why the orbital velocity is independent of the mass of the satellite. (2)
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
There are several reasons why the value of gravitational acceleration varies at
different places on the Earth’s surface.
(a) If the rotation of the Earth increased so that the length of a day became shorter, outline the effect on the value of g at a place near the equator and at the south pole. (2)
(b) Describe how the orbit of geostationary satellites would need to change if the Earth rotated faster. (2)
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
When it operated, the Space Shuttle was able to attain a low-Earth orbit at an altitude of several hundred kilometres. However, it was not considered as “escaped” from Earth’s gravitational field.
Describe the conditions necessary for a spacecraft to escape Earth’s gravitational field in terms of the energy required using appropriate equations and symbols. (4)
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.