P = F/A = 20/(5*2) = 2 Pascals.
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There is not enough information to calculate pressure. Here are some relevant formulae: Force = mass x acceleration Pressure = force / area
we know pressure = force/area we can calculate force from this equation therefore force =mass *acceleration a=9.8 finally we obtain the mass.
Pressure is defined as the following Pressure = force / area. So what this means is pressure is how much force is exerted over a area of given size. For examle a concrete slab is on the floor this slab has a width of 2m and a length of 2 m its area is 2 x 2 which gives 2m Squared. Its force it exerts is 1000 newtons ok what the hell does this mean? if you place this in the formula you will get pressure = 1000/4 Pressure = 250 newtons per square metre. I hope this answers you question on what pressure is.
Depends on the amount of time we are given to stop the car. Force = mass x acceleration If we are given 1000 000 seconds to stop the car Force = 500kg * 30/1000000 = 0.015N
Force is given by Newton's second law: F = ma where F is the force, m is the mass and a is the acceleration. F=2000kg x (25 m/s)2 / 80 meters 15,625n