A stationary van is filled with 1 tone of bees sitting down. As an engineer, I know that friction does not depend upon surface area. As a car nut, I know that wider tires have better traction. I am 11 yrs old and soon to be going to Magic Mountain to ride a roller coaster for the first time. My Dad says that I really don't need a safety harness when the roller coaster goes upside-down because centrifugal force will hold me in.
Atmospheric pressure is supposed to be very large.
A pendulum is hanging in a lift and is oscillating. The lift is given a free fall. I was told by my Physics instructor that there is such a thing as negative time. Two cars traveling at 60 mph collide head on. Another car crashes into a wall at 60 mph.