How Do You Calculate the Upward Force When a Calculator Rebounds Off the Floor?

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SUMMARY

The discussion focuses on calculating the upward force exerted on a calculator that rebounds off the floor after being dropped from a height of 5 meters. The calculator, weighing 500 grams, rebounds to a height of 4 meters and is in contact with the floor for 10 milliseconds. The relevant equations include Fg = mg for gravitational force and the need to consider the calculator's velocity before and after impact to determine the net force. The solution involves applying concepts from kinematics, specifically SUVAT equations, to find the velocity and subsequently the upward force.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Familiarity with kinematic equations (SUVAT)
  • Basic knowledge of force and momentum relationships
  • Ability to perform calculations involving mass and gravitational force
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  • Learn how to apply SUVAT equations in practical scenarios
  • Study the relationship between force, mass, and acceleration
  • Explore the concept of impulse and momentum in physics
  • Investigate the effects of time of contact on force calculations
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High school physics students, educators teaching mechanics, and anyone interested in understanding the principles of force and motion in practical applications.

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Homework Statement


[/B]
Gr.11 Physics, about 2 months in so I don't know much.

Bob pitches his calculator into the air and watches it rise to a height of 5 meters above the floor, and rebound to a height of 4 meters. The calculator was in contact with the floor for ten milliseconds, and it has a mass of 500 grams. Calculate the upward force exerted on the calculator by the floor.

Homework Equations



Here's all the equations I think would be relevant?:

Fn = Fg
Fg = mg
Ff = uFn
Fnet = ma

The Attempt at a Solution



I'm not entirely sure where to start with such little info. I tried to get the Force of Gravity (Fg) like this:

Fg = mg
= (0.5kg)(9.8)
= 4.9N

But I feel like the fact that it was accelerating towards the ground would increase that?

Any help is appreciated.
 
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BrodieEX said:
Here's all the equations I think would be relevant
No, none of those are interesting here.
Does SUVAT mean anything to you?
What about a relationship between force and momentum?
 
haruspex said:
No, none of those are interesting here.
Does SUVAT mean anything to you?
What about a relationship between force and momentum?

No, and no :/ My teacher has a habit of giving us questions for things he hasn't taught us yet. Could you explain?
 
Ah I found a video on exactly what I was looking for. I got it now :)
 
Try to calculate the velocity right before and after the calculator hits the floor and see if you can use this to figure out the force
 

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