A piece of chalk is tossed vertically upward by Prof. Schwarzenegger and hits the ceiling 98 feet above with a BANG. (Neglect the effects of air resistance. Round your answers to two decimal places.) (b) Assuming that Prof. Schwarzenegger in fact tossed the piece of chalk up at 98 ft/s, how fast was it moving when it struck the ceiling? ft/s (c) Assuming that Prof. Schwarzenegger tossed the chalk up at 98 ft/s, and that it recoils from the ceiling with the same speed it had at the instant it hit, how long will it take the chalk to make the return journey and hit the ground? @Mathem

8 years agoany clues? haha

8 years agoVfinal^2 = Vinitial^2 + 2aX 1. sqrt((98^2) + 2(-9.81)98) 2. sqrt(-(98^2) + 2(-9.81)98)

8 years agois that b or c?

8 years ago1 is b 2 is c

8 years agothat formula that i gave you, has your teacher taught you that?

8 years agoisnt the square root of 92 squared 98?

8 years agonot sure what you mean

8 years agofor the first part of #1 you gave me

8 years agocalculate everything before you take the square root

8 years agoive set it equal to V final, so i took the square root to cancel the square

8 years agoi just noticed an error with #2

8 years agoiim not getting number 1 right i solved and got 87.6

8 years agolet me get a calc

8 years agoseems right to me

8 years agogeez i dont know what im doing wrong

8 years agowhat did you get when you solved c?

8 years agodo you know how to do quadratic equations?

8 years agoyeah but i dont know how im getting c wrong

8 years agocan you tell me what you get

8 years agoi got about 1.06

8 years agooh lol its in feet

8 years agothis has to be converted to meters in order to use most physics formulas

8 years agocan you tell me b and c quick? im sorry to rush gotta go soon

8 years agowell a doesnt need to be converted to meters a second, so its 87.6

8 years agoi mean b

8 years agookay

8 years agoand c?

8 years agoand c i got .9518 seconds after converting

8 years agoit didnt work neither did but thank you

8 years agoits those conversions

8 years agoDo you have the answers, are you trying to know how to do it?

8 years ago