Question

A person, 175 lbm, wants to fly (hoover) on a 4 lbm skateboard of size 2 ft by 0.8 ft. How large a gauge pressure under the board is needed?

Answer 1

`p = 15260.643 \ lbf/ft^2`

Step-by-step explanation:

person weight is 175 lbm

weight of stake board 4lbm

size of stakeboard = 2ft by 0.8 ft

area of stakeboard is
`2*0.8 ft^2 = 1.6 ft^2`

gauge pressure is given as

`p =( w_p+w_s)/(A) g`

where is g is acceleration due to gravity = 32.17 ft/sec^2

puttng all value to get pressure value

`= (175 +4)/(1.6)* 32.17`

`p = 15260.643 \ lbf/ft^2`