Grav fields Flashcards
1
Q
Lines bend in
Suggest why the field lines converge over a small area at K. (2 marks)
A
- (Lines are closer together so) the FIELD is stronger
- (Material forming the Earth) at K has a high(er) density
2
Q
A ball travelling at constant speed passes position J moving towards position K in
Figure 6.
Assume friction is negligible.
Explain any change in the speed of the ball as it approaches K.
(2 marks)
A
The ball will speed up/accelerate (when moving towards K)
(because) the potential is lower at K
OR
the angled field lines between J and K have a component towards the
right ie towards K)
3
Q
Explain why the lines of force shown in Figure 7 cannot represent a gravitational
field (1 mark)
A
-A gravitational field should only show attraction to a body / lines of
force should only be going to an object
