Concrete block smashed on lecturer's chest with sledge hammer.
What it shows:
The lecturer (or someone else) lies on a bed-of-nails without discomfort, thus demonstrating the concept of pressure, which is the force per unit area. For added drama the person...
Sliding tablecloth out from under posh dinner setting.
What it shows:
A body will remain at rest unless a force acts upon it. So too will your best china remain in place as the table cloth is whipped from under it providing the friction between the cloth...
Irregular lamina with marked center-of-mass tossed in air.
What it shows:
The center of gravity fixed in (or outside) the object always orients itself with minimum potential energy on a vertical line below the support point. When an irregular shape is...
