Needs help with pressure and work done

In summary, the question is asking which of two rocks thrown down at different heights will exert more pressure on the floor. The answer is that both rocks will exert the same amount of pressure, as calculated using the equation f=ma. However, when the rocks hit a can on the ground, the one thrown from a higher height will cause more damage due to the work done during the impact. This is related to concepts such as impulse, momentum, and collision.
  • #1
shogojiawei
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needs help with pressure and work done!

Homework Statement


if a 2 similar rocks are thrown down at different height, one at 100m and 1 at 200m, which one will exert more pressure on the floor?


Homework Equations





The Attempt at a Solution


when i use f=ma, f in both cases are the same as the m and a are the same. since f is the same, pressure should also be the same. however when both rocks hits a can on the ground, the one that is hit by the rock at 200m will get more squash. why? is it because of work done?
 
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  • #2


it's something related to impulse, momentum, collision... if you have learned these chapters it should be easy enough for you to understand.
 

What is pressure?

Pressure is defined as the force exerted per unit area. It is typically represented by the symbol P and is measured in units of newtons per square meter (N/m2) or pascals (Pa).

What is work done?

Work done is a measure of the energy transferred when a force is applied over a certain distance. It is represented by the symbol W and is measured in units of joules (J).

How are pressure and work done related?

Pressure and work done are related by the equation W = PΔV, where ΔV is the change in volume. This equation is known as the work-energy theorem and states that the work done on an object is equal to the change in its kinetic energy.

What factors affect pressure and work done?

Several factors can affect pressure and work done, including the force applied, the area over which the force is applied, and the distance over which the force is applied. Additionally, the type of material being compressed or expanded can also impact these values.

How are pressure and work done used in real-world applications?

Pressure and work done have many practical applications, such as in the design and operation of hydraulic systems, engines, and pumps. They are also important in fields like physics, engineering, and chemistry, where they are used to understand and analyze various phenomena and processes.

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