Question

The air pressure in a tire is 800.000kPa.The internal surface area of the tire is 550.000cm^2. Determine the total force applied by the air to the tire. (Round to 3 decimal places).

ANS = 44.000kN

Force = Pressure x Area
= 800.000kPa x 550.000
= 440000.000N
= 440.000kN

I keep making the same mistake. Please let me know what I am doing wrong. I can't figure how to get the right answer of 44.000kN.

Answer 1

1kPa = 1000 N/m^2
Your area is 550 cm^2, not m^2
Gotta get the proper units.

Unfortunately, it still doesn't look like it works out.

Answer 2

I think the answer must be 44N, not 44kN.