“An object in motion will remain in motion and an object at rest will remain at rest, unless acted upon by an unbalanced force” Newton’s first law is often thought of as basic and obvious. But is it really so? In this discussion I use two toys, a ramp walker and gravity walker to explore. I have had the walking camel since my Year 1 year (so it is rated as antique!) and I still find it an engaging demo!
The phenomenon of air pressure is hard to visualise. But here is a fun and exciting way to demonstrate the effect of air pressure. We use a vacuum cleaner to remove only 10% of air from a bin liner. The result is a bag that is firmly squashed and stretched around the body due to external air pressure.
The instant measurement of the average speed of a projectile or object can be very useful in the physics lab. Students often need to implement project design changes, and the average speed can be a great measure of the success of the upgrade. And the best – no special equipment is required. Most students own a mobile phone that comes packed with valuable sensors.
There are numerous oscillating objects, electromagnetic waves and flickering lights out there that cannot be observed by human sight. Our sense of sight is just not able to perceive and detect these fast changing images. In this snippet I will show you an easy way to expose this “secret world” to your students using a solar panel and speaker.