PHYS 2001 Lecture : PHYS2001 Free Fall Notes
Document Summary
Example: you are driving along in the country at 90 km/hr, when you suddenly notice a cow in the road 30 m ahead. You attempt to stop the car by pressing on the brakes, but the distance is too short. Assume your reaction time is 0. 75 s and that the deceleration of your car is. 7. 84 m/s2 when the brakes are applied. a. You have a reaction time of 0. 75 s, so the car moves closer to the cow by an amount: This only leaves: 30 m 18. 75 m = 11. 25 m of distance left to the cow. We know a, we know x, and we know vo. At the 18th green of the u. s. open, tiger woods needs to make a 20. 5 ft. (6. 25 m) birdie putt to win the tournament. When he hits the ball, giving it an initial speed of. 1. 57 m/s, it stops 6. 0 ft. (1. 83 m) short of the hole.
