Answer to Question #151317 in Classical Mechanics for Chae

Question

Upon seeing a red light, a 50. kg driver puts his entire weight on the brakes for a time period of 2.0 seconds. What is the magnitude of the impulse imparted by the driver onto the brakes?

Answer 1

Answer

Impulse is given by

$I=F_{av}\Delta t=mg \Delta t\\=50\times9.8\times2=980$ N-sec