You are standing on a ladder, helping with some repairs at home. you drop a hammer and it hits the floor at a speed of 12 feet p
er second. if the acceleration due to gravity ( g. is 32 feet/second2, how far above the ground (h) was the hammer when you dropped it? use the formula:
This is the concept of speed, distance and time, we are required to calculate the distance that a ladder which moved at a speed of 12 ft/sec fell from given that acceleration due to gravity is 32 ft/sec^2. acceleration,a=(v-u)/t since the hammer began at 0 speed, then time taken will be: a/s =12/32 =3/8 seconds but distance=speed*time thus; distance=3/8*12 =4.5 feet
This pressure difference will be greater if the scuba diver were in seawater and went to the same depth because the seawater have salts which increases the density of water as compared to freshwater. Salt in water increases the density which automatically increases the pressure on the diver so that's why we can say that the pressure will be increases for the scuba diver in seawater as compared to freshwater.