Helpmyphysics

Electric Field

Hi Physics lovers! Here is a great link to that incredible useful PhET physics site.
In this simulation you can arrange different electric charges in space and see the electric field produced around these electric charges.

There is much more fun as well. Once you have built the electric field then you can see what it does to a charge placed in that field.
You can try and get the test electric charge into a goal.

Electric field lines don`t exist for real. They just show the strength and direction of the force which acts on a positive electric charge.

Click on the picture or go to this link for some electric field fun.

PhET Electric Field Hockey

Hi Physics lovers, here are the answers to the questions I set for the October holiday week:

1. 1) 52.5m
2. 2a) vertical velocity = 15m/s, horizontal velocity = 26m/s
3. 2b) 1.5 seconds to reach the top
4. 2c) Remember to double the time. Distance = 78m
5. 3a) 3m/s2
6. 3b) 30 N
7. 4a) 147 000 N
8. 4b) 327 000 N
9. 5a) 294 N
10. 5b) frictional force = 294 N
11. 6a) 3m/s2
12. 6b) 512 N
13. 6c) 272 N
14. 6d) 0 N

See you all on Tuesday when we will continue the Higher physics story looking at momentum!

Check out this physics movie of a live projectile experiment using ball bearings.

Hi Physics lovers, check out this video which shows how your weight changes when an elevator moves up and down.

Some Questions…..

1. What was the reading on the Newton scale when the elevator was at rest?
2. What happened to the weight reading when the lift accelerated downwards?
3. What happened to the weight reading when the lift accelerated upwards?
4. What happened to the weight reading when the lift was coming to a stop on the way up?
5. What happened to the weight reading when the lift was coming to a stop on the way down?
6. Can you work out the initial upwards acceleration of the lift?

Lift Physics Link

Hi physics lovers,
Here is a movie showing you how to find the total time of flight of a projectile.

Hi Physics lovers!
Here is a method to find the maximum height reached by a projectile.