How Do You Calculate Forces and Time for a Falling Object?

AI Thread Summary
To calculate the forces acting on a falling object, the downward force due to gravity (Fg) can be determined using the equation Fg = m * g, resulting in 0.5586 N for a mass of 0.057 kg. The net force acting on the object will depend on the presence of air resistance, which acts upward and can vary based on the object's shape and material. For a lead pellet, air resistance is minimal, while for a larger object like a polystyrene block, it becomes significant. To find the time it takes to hit the ground, the height of the drop (5.1816 m) and the net force must be considered. Understanding these forces is crucial for accurately calculating the motion of the falling object.
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Homework Statement


The height of which it will be dropped 5.1816m, then the mass is 0.057kg. and the gravity is 9.8m/s^2 .What is the force downward? what's the net force and what's the up force? and what's the time to hit the ground?


Homework Equations


Fg=m*g


The Attempt at a Solution


Fg=.057kg*9.8=.5586 N
thats all i know how to do thanks
 
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playW/Gravity said:

Homework Statement


The height of which it will be dropped 5.1816m, then the mass is 0.057kg. and the gravity is 9.8m/s^2 .What is the force downward? what's the net force and what's the up force? and what's the time to hit the ground?


Homework Equations


Fg=m*g


The Attempt at a Solution


Fg=.057kg*9.8=.5586 N
thats all i know how to do thanks

The only other thing that may be significant is are resistance once the mass starts falling. If the mass is a lead pellet, air resistance won't have much significance. If the pass is a huge block of polystyrene, air resistance will be significant.
The only thing you know for sure is that air resistance on a falling object is directed up.
 
PeterO said:
The only other thing that may be significant is are resistance once the mass starts falling. If the mass is a lead pellet, air resistance won't have much significance. If the pass is a huge block of polystyrene, air resistance will be significant.
The only thing you know for sure is that air resistance on a falling object is directed up.

its an egg , but how do u fund the other forces
 
playW/Gravity said:
its an egg , but how do u fund the other forces

I would have thought gravity and iar resistance is all.

For all situations, remember the following.

Field forces arising from Gravity, electrostatics and magnets act without contact.

All other forces are contact forces - something pushing, or pulling via a thread/string.

For the egg you can likely rule out electrostatics and magnets, so we have gravity plus anything else that is touching the egg.
 
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