Drakon25th
Dec7-03, 09:05 PM
Hello,
Alright, this is the problem:
Calculate the torque about the front support of a diving board exerted by a 70kg person 3.0m from that support
here's the picture:
________________person
|<-1.0m->|<--3.0m-->:
^ ^ ^
| | |
F1 F2 CG
Alright this is what i have done so far:
\sum T = 0
\sum T = m*g*d_F1-F2 - m_p *g*d_F2-person = 0
\sum T = m*g* 1.0m - 70.kg * g *3.0m = 0
m*g*1.0m = 70.kg*g*3.0m
m = (70.kg*g*3.0m)/(g*1.0m)
m = 210kg
I know the answer is supposed to be 2.1 x 10^3 m*N, but i don't know what to do after finding the mass on F1; can someone help me?
Alright, this is the problem:
Calculate the torque about the front support of a diving board exerted by a 70kg person 3.0m from that support
here's the picture:
________________person
|<-1.0m->|<--3.0m-->:
^ ^ ^
| | |
F1 F2 CG
Alright this is what i have done so far:
\sum T = 0
\sum T = m*g*d_F1-F2 - m_p *g*d_F2-person = 0
\sum T = m*g* 1.0m - 70.kg * g *3.0m = 0
m*g*1.0m = 70.kg*g*3.0m
m = (70.kg*g*3.0m)/(g*1.0m)
m = 210kg
I know the answer is supposed to be 2.1 x 10^3 m*N, but i don't know what to do after finding the mass on F1; can someone help me?