Helpmyphysics

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.

My first year class were given a task to adopt a famous scientist at the beginning of the session.
They were told to collect some information, write it out themselves and make a podcast to share with students around the world.

Click on the picture below to hear their speeches.
A big thing about being a scientist is that you need to communicate.

Download projectile investigation sheet here.
Click the picture to take you to the pHET simulation page.
Once there please click the run now box and use your investigation sheet to answer the questions.

Hi Physics lovers! Here is the answer video for Assessment 002Q1.
When you start the movie you can press the small controls to view fullscreen.

Hi physics lovers. Here is the link to download the Higher Physics Assessment 02A.

Higher Physics Assessment 02A

Hi Physics lovers, here are the answers to the homework problems 1.24 to 1.29

1.24 Displacement = -30.6m so depth = 30.6m
1.25 Displacement = -0.82m so height dropped = 0.82m

1.26 (a) 0m/s
(b) 10m
(c) -14m/s ie 14m/s going down
(d) 2.86s

1.27 (a) From the instant it is released it will be subject to negative acceleration -9.8m/s2 So its velocity will decrease to zero and then increase negatively until it strikes the ground.
(b) Displacement = -32.1m so height = 32.1m
(c) Final velocity = -25.4m/s
1.28 (a) 1.53s
(b) 11.5s
(c) 14.7m

1.29 (a) 6.1s
(b) 183.7m

Mr Mallon

Jamie Lang of Mr Mallon`s Physics class shows how to measure the speed of sound using two microphones attached to an electronic timer.
The distance between the microphones was 1 metre.

Download speed of sound worksheet here.