hatemT
27-04-2011, 11:40 PM
A ball is thrown directly downward, with an initial speed of 8.00 m/s, from a height of 30.0 m. After what time interval does the ball strike the ground
مشاهدة النسخة كاملة : Advanced Problem 5 hatemT 27-04-2011, 11:40 PM A ball is thrown directly downward, with an initial speed of 8.00 m/s, from a height of 30.0 m. After what time interval does the ball strike the ground hatemT 27-04-2011, 11:46 PM Setting a new world record in a 100-m race, Maggie and Judy cross the finish line in a dead heat, both taking 10.2 s Accelerating uniformly, Maggie took 2.00 s and Judy 3.00 s to attain maximum speed, which they maintained for the rest of the race. a) What was the acceleration of each sprinter b) What were their respective maximum speeds c) Which sprinter was ahead at the 6.00-s mark, and by how much BaSiL NaSR 12-01-2012, 06:37 AM About 8.2 seconds abdo281 27-02-2012, 02:26 PM we assume that g = 9.8 m /s² V1 =8 m/s v2 = ? g = 9.8 m /s² height = 30 m Applying the equation v2² -v1² = 2gx v2² - 8² = 2 × 9.8 × 30 v² = 652 m/s v =25.53 m /s So the time is v2 - v1 / g t= 25.53 - 8 /9.8 t = 1.788 seconds منير يوسف 18-03-2012, 09:36 AM hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh منير يوسف 18-03-2012, 09:42 AM ghhghghhhhhhhhhhhhhh kokoreda 05-09-2015, 12:03 AM thanksssssssssssssss AymanEmam 25-09-2016, 05:39 PM thank you Bahaa Said 28-06-2017, 12:55 PM اشكرك اخى الفاضل |