Answer to Question #82581 in Physics for Nvm

Question #82581

an object is dropped from a 42 m tall building. how long does it take to reach the ground

Expert's answer

When object was dropped from some height, it displacement

h=v_i t+(at^2)/2=(gt^2)/2

So

t=√(2h/g)=√((2×42)/9.8)=2.9 s

Learn more about our help with Assignments: Physics

Comments

No comments. Be the first!

Leave a comment

Related Questions

1. A train started from rest and moved with constant acceleration.at one time it was traveling 30m/s a
2. The speed of a car is reduced from 30m/s in a distance of 100m on applying the brakes assuming the r
3. Derive an expression for the bulk modulus of a cubic crystal.
4. Copper has a Debye temperature of 340 K and a Fermi temperature of 81000 K. At what temperature wil
5. Determine the conditions governing geometrical structure factor for an fcc lattice. Is reflection o
6. What is the equation describing the motion of a spring that is stretched 20cm from the equilibrium a
7. A vase went past a window at 14m/s (it was already falling in the first place) and hit the ground in