Recent content by Casey314stl

Homework Statement A robot probe drops a camera off the rim of a 235 m high cliff on Mars, where the free-fall acceleration is 3.7 m/s^2 Find the velocity with which it hits the ground. Answer in units of m/s Homework Equations v^2f=v^2i+2aΔd The Attempt at a Solution 41.7013

I got this one nvm but can someone help me with the one titled "help with problem"

Homework Statement What is the instantaneous velocity of a freely falling object 19 s after it is released from a position of rest? The acceleration of gravity is 9.8 m/s^2 Answer in units of m/s Homework Equations Δv=aΔt The Attempt at a Solution 186.2

Homework Statement A knight sits on a castle wall during a siege. To while away the time, he notes that boulders catapulted from below land on the top of his wall with a vertical velocity of 9.2 m/s. If he is 40 m above the catapult, what is the initial velocity of the boulders? The...

I am solving for Vf^2 which is vertical speed final? so I plug in 0-2(10.8)=-21.6?

so how do i use this to find the height?

what does u and is stand for?

Homework Statement A ball is thrown upward. What is its maximum height? Its initial vertical speed is 10.8 m/s and the acceleration of gravity is 9.8 m/s^2 Neglect air resistance. Answer in units of mHomework Equations dfinal=dintial+vfinalΔt+ 1/2averageaccelerationΔt^2 or...

I already got the the answer from the last response I was just wonder why it was half the time^2 if that was for every problem for this equation or just if an object is traveling up?

Thanks a lot I got it but why is it half time^2?

what?

22.9653?

I tried H=.5*g*t^2 and got 4.68677?

The attempt at a solution 9.8/0.978^2= 10.245

Homework Statement A basketball player achieves a hang time of 0.978 s in dunking the ball. What vertical height will he attain? The acceleration of gravity is 9.8 m/s^2 Answer in units of mHomework Equations ? The Attempt at a Solution 9.8/0.978^2= 10.245 Homework Statement Homework Equations...