A200-pound man has a total foot imprint area of 72 in2. determine the pressure this man exerts on the ground if (a) he stands on both feet and (b) he stands on one foot.

(a) Pressure will be

(B) Pressure will be

Explanation:

We have given weight of the body = 200 pound

Total area of foot imprint

(A) When man stands on both feet total area will be

So pressure

(B) When man stands on 1 foot

So area

Pressure

the area between the graph and the t axis

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me