Recent content by James2020

The force acting parallel to the slope causes the car’s acceleration so, since F=ma, you have mgsin(θ)=ma so a=gsin(θ).

Hello, This is an invaluable textbook which I regularly use to self-educate myself before teaching students however something that would be particularly useful would be answers to all the end of chapter questions. I know numerical answers are given but that it. I know it’s unlikely due to the...

No the lamp doesn’t have a dimmer. The frame rate of the camera is 120fps whilst recording in slow motion. I can observe the lamp visibility dimming & brightening so it certainly seems that the frame rate is high enough. Thank you.

When I record slow motion video of my filament bulb lamp connected to mains, I can be completely sure that it flashes 25 times per second. This is half of the 50 hertz AC frequency. I would expect it to flash 100 times per second as the current reaches a node twice per cycle in it’s AC wave. Why...