Circular motion

Question 1

If an object is moving in a circle it is…

Answer 1

constantly changing direction therefore it is constantly accelerating.

Question 2

What is the force that keeps things constantly moving in a circle called?

Answer 2

centripetal

Question 3

The faster an objects moving in a circle, the

Answer 3

bigger the centripetal force must be to keep it moving in a circle.

Question 4

the heavier the object moving in a circle, the

Answer 4

bigger the centripetal force mut be

Question 5

You need a larger force to keep something moving in a

Answer 5

smaller circle

Question 6

An orbit is possible when..

Answer 6

there is a balance between the forward motion of the object and the gravitational force pulling it inwards.

Question 7

If the balance in an orbit broke then…

Answer 7

the smaller object would fly off at a tanget.

Question 8

Gravity decreases quickly as you get

Answer 8

further away

Question 9

the closer you get to a star or planet the

Answer 9

stronger the force of attraction

Question 10

To counteract the stronger gravity, the planets nearer the sun

Answer 10

must move faster, covering their orbit quicker.

Question 11

4 purposes for artificial satellites

Answer 11

monitoring of the Earth(weather climate etc.)
Communications (phone, tv)
space research
spying

Question 12

Geostationary orbit

Answer 12

high orbits over the equator taking exactly 24 hours, so they stay above the same point. (communication)

Question 13

Low polar orbit

Answer 13

Goes over both poles whilst the Earth rotates beneath it, just takes a few hours, spying photos, etc.