Question

I need to know the correct answer please ?

Answer 1

675 Pa.

Step-by-step explanation:

F = 5+2cos(15t) kN

Area (a) = 8*10-3 m2

Now at t =4 sec

F= 5+2cos(60)

= 5+2*0.5

= 6 kN

Now ,force efficiency is 90%.

Hence,the effectively transmitted force,

Fe = 0.90*6

= 5.4 kN

Hence,pressure is given as,

P = Fe/a

= 5.4*10^3/(8 *10^-3))

P = 675 Pa....answer