Evel Knievel became famous
for jumping over things on a motorbike. On March 25 1967 he did his first jump
for a TV sports channel and managed to clear 15 cars (90 feet). Assuming his
take-off angle was 45 degrees and air resistance was negligible (which it is
not) what would his velocity (m/s) have to be just before he left the take-off
On May 31, 1975 he performed his last jump at Wembley Stadium UK. He attempted
to jump over 13 busses and had to reach 90 miles per hour at the take-off to do
this. Unfortunately the take-off ramp was not long enough for him to achieve
this and he landed ”just shy” of the landing ramp breaking his pelvis again.
The big red London busses were 2.43m wide. If he had been able to reach his
desired speed what would his maximum height above the busses have been if you
could ignore air resistance?
c) It is not possible to ignore
air resistance. Compare the distance he wanted to cover in the real world with
the “theoretical” distance that could be covered if there was no air