me with this projectile problem

  • Thread starter Thread starter mheghan23
  • Start date Start date
  • Tags Tags
    Projectile
AI Thread Summary
To determine the time required for a package dropped from an airplane at 1050 m altitude to hit the ground, the formula s = ut = 1/2gt² can be applied, with gravity set at 9.81 m/s² and initial vertical velocity as zero. The horizontal motion remains constant at 115 m/s. For the final speed and direction of the package just before impact, the final vertical velocity can be calculated using v = u + at, and then combined with the horizontal velocity to find the resultant velocity and angle. The discussion highlights the need for clarity in applying these physics principles to solve the projectile problem effectively. Understanding these calculations is essential for accurately predicting the package's trajectory.
mheghan23
Messages
1
Reaction score
0
1.Figure shows an airplane moving horizontally with a constant velocity of 115 m/s at an altitude of 1050 m. The direction to the right and upward have been chosen at the positive directions. The plane releases a "care package". That falls to the ground along a curved trajectory. Ignoring air resistance determine the time required for the package to hit the ground.

2. For the same situation, find the speed of the package and the direction (angle) of the velocity vector. Just before the packages hits the ground.

horizontal motion
formula: X2= X1= Vx1t

Vertical motion
Y2=Y1+Vy1t - 0.5gt2

I Can't solve this because I don't how to solve this. My prof didn't gave us any clue for us to solve this problem..

so if you know the answer for this problem, please reply




The Attempt at a Solution

 
Physics news on Phys.org
For 1, you just need to use the s = ut = 1/2at^2 formula to get the time taken to descend 1050. acceleration due to gravity is 9.81ms^-2, the initial vertical velocity is zero. plug in the values into the formula.

For 2, the horizontal velocity is the same. use the v = u + at formula to get the final vertical velocity and with a bit of geometry and vector sum you will get the direction and the resultant velocity.
 
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Thread 'Egg Drop Challenge! Need ideas for winning designs'

I was thinking using 2 purple mattress samples, and taping them together, I do want other ideas though, the main guidelines are; Must have a volume LESS than 1600 cubic centimeters, and CAN'T exceed 25 cm in ANY direction. Must be LESS than 1 kg. NO parachutes. NO glue or Tape can touch the egg. MUST be able to take egg out in less than 1 minute. Grade A large eggs will be used.
View full post »

Similar threads

Find the height of a lamp based on the velocities of projectiles
Replies
40
Views
2K
projectile motion problem with no initial velocity given
Replies
3
Views
705
How Does Projectile Angle Affect Asymptotic Behavior in Physics Graphs?
Replies
23
Views
3K
Ball launched from a height of 5 meters --- Projectile motion
Replies
12
Views
1K
Find Projectile Flight Time Given Only Maximum Height
Replies
4
Views
2K
Find the initial velocity of the package relative to the ground
Replies
18
Views
2K
Why is my answer wrong? Projectile Motion
Replies
3
Views
4K
I need opinions on a Projectile Motion problem that I made up
Replies
11
Views
2K
Projectile motion of a cannon ball versus time
Replies
15
Views
2K
Why Does Helicopter Velocity Affect Package Drop Time?
Replies
4
Views
2K

Hot Threads

Recent Insights

Back
Top