Homework Statement
A spaceship passes you at a speed of .750c. You measure its length to be 28.2 m. How long would it be when at rest?
Homework Equations
I think the equation that is relevant is L=L(sub0)xsqrt(1-v^2/c^2)
The Attempt at a Solution
L=28.2xsqrt(1-(.75^2))=18.65m...
Homework Statement
Suppose you are driving a light weight pickup truck, and it takes 15m of stopping distance to stop when you are traveling 5 m/s, using max. force from the brakes.
1. Suppose you really load up the truck, so that the mass of the loaded truck is twice that of the unloaded...