How Do You Calculate Force and Distance in Physics Problems?

AI Thread Summary
To calculate the minimum force required to catapult an F18 Super Hornet from rest to a take-off speed of 248 km/hr, the mass of the jet (21,320 kg) and the distance of the flight deck (237 m) must be considered. The relevant equations include F=ma for force and various kinematic equations for distance and acceleration. For the second problem, determining how far a train car travels up a 3.73-degree incline before stopping involves using initial speed (3.25 m/s) and the incline's angle to find acceleration. It's suggested to list known variables and apply the appropriate equations to solve for unknowns. Understanding these concepts is crucial for tackling physics problems effectively.
eribac
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Homework Statement


1.On an aircraft carrier, an F18 Super Hornet can be catapulted from 0 to a take-off speed of 248 km/hr. The loaded mass of this jet in fighter configuration is 21,320 kg. The length of the angled section of the flight deck on the US Nimitz class carriers is 237 m. What minimum force must be applied to the jet?

2.A train is traveling up a 3.73-degree incline at a speed of 3.25 m/s when the last car breaks free. How far does the last car travel before its speed momentarily reaches zero?

Homework Equations


These weren't given to me, just the ones I've tried using:
F=ma
d=Vo2 + 1/2at2
Vf=Vo + at
d = (Vf2-Vo2)/2a
Vox = Vocos(theta)
Voy = Vosin(theta)

The Attempt at a Solution


I have made several attempts at these questions, but I am not very good at physics so I honestly do not know if they were even close, thus why I didn't bother posting them. Any help, even just a starting point or concept explanation, is greatly appreciated.
 
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welcome to pf!

hi eribac! welcome to pf! :wink:

Show us what you've tried, and where you're stuck, and then we'll know how to help!

start with problem 2 :smile:​
 
Try listing all the things you're given in the problem and look at your equations to see which ones you can use in order to solve for the missing variable.

Example: d=something,v0=something, vf=something, --> you can use d = (Vf2-Vo2)/2a to solve for a.
 

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