Come Do This Easy Question! (1 Viewer)

[kooltrainer]

During a visit to the moon, a person throws a rock vertically and it reaches a height of 20m. Accerleration due to gravity on the moon is 1.6.. what is the speed at which it was thrown

a)25.3m/s
b)62.6m/s
c)640m/s
d)3920m/s

 

[kooltrainer]

V^2 = U^2 +2a delta Y
0 = U^2 -2x1.6x20
U = 8m/s


what wrong with this working out?? they dun have this answer to choose from

 

[Aerath]

I would've done it your way. But then again....I'm not exactly the best at Physics.

 

[Mark576]

During a visit to the moon, a person throws a rock vertically and it reaches a height of 20m. Accerleration due to gravity on the moon is 1.6.. what is the speed at which it was thrown

a)25.3m/s
b)62.6m/s
c)640m/s
d)3920m/s

Are you sure that's supposed to be 20m? Cause I think if you use 200m it gives (a), using your method.

 

[xiao1985]

Question is wrong?

 

[Pwnage101]

http://community.boredofstudies.org/showthread.php?t=176940

 

[kooltrainer]

Are you sure that's supposed to be 20m? Cause I think if you use 200m it gives (a), using your method.

dayum.. ur right... 200 m works.. but i swear i can see the dot in 20.0 m in that question..

thx btw