Calculating Falling Objects: GPE, KE and Speed

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SUMMARY

The discussion focuses on calculating the gravitational potential energy (GPE), kinetic energy (KE), and vertical speed of a 57g tennis ball dropped from a height of 90cm under Earth's gravity of 10 N/kg. The gravitational potential energy can be calculated using the formula GPE = mass × gravity × height, resulting in 5.13 Joules. The kinetic energy at impact is equal to the gravitational potential energy at the height of release, also 5.13 Joules. The vertical speed upon landing can be determined using the kinematic equation, yielding a speed of approximately 4.24 m/s.

PREREQUISITES
  • Understanding of gravitational potential energy (GPE)
  • Knowledge of kinetic energy (KE) calculations
  • Familiarity with basic physics equations for falling objects
  • Ability to perform unit conversions (grams to kilograms)
NEXT STEPS
  • Learn the formulas for gravitational potential energy and kinetic energy
  • Study the kinematic equations for motion under gravity
  • Explore energy conservation principles in physics
  • Practice problems involving falling objects and energy calculations
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Students studying physics, educators teaching mechanics, and anyone interested in understanding the principles of energy related to falling objects.

Ravious
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I have some questions which I don't understand.

Assume that all questions take place chose to surface of earth
gravity = 10n/kg

1) a 57g tennis ball is dropped from a height of 90cm

a) What is the gravitational potential energy of the tennis ball before it is dropped?
b) What is the kinetic energy of the ball as it lands?
c) What is the vertical speed of the ball as it lands on the ground?

Help of any kind would be appreciated
 
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First, in order to receive help, you must show some effort at solving your problem.

Second, there are key terms in the OP which you can look up or should have some notes on, like 'potential energy', 'kinetic energy', and 'vertical speed' of falling objects.
 
As SteamKing pointed out, you have to show us how you approached the problem that led you astray. We will not just give you the answer. We can point you in the correct direction, though. Is there anything that you tried to do? If so, show us your work and we can see where you may have gone wrong.
 

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