Recent content by jjesiee

you sure? I've never heard of that before but thanks.

it wouldn't matter though cause vi= 0 (i think)

Homework Statement the question is: A 62 kg person in an elevator is moving up at a constant speed of 4.0 m/s for 5.0 s. T / I C (b) Calculate the work done by the normal force on the person. (c) Calculate the work done by the force of gravity on the person. (d) How would your...

so if i calculate fg=mg on the hanging mass, would the force of tension be the same as fg?

Homework Statement A 4.0 kg block of wood sits on a table. A string is tied to the wood, running over a pulley and down to a hanging object. The greatest mass that can be hung from the string without moving the block of wood is 1.8 kg. Calculate the coefficient of static friction...

give me another hint? i don't get it :s

no i got it :D thanks a lot . I was probably just thinking too much but now i have another problem. If you don't mind can you help me with that question? Two go carts A and B race each other around a 1.0 km track. Go-cart A travels at a constant speed of 20.0 m/s. Go cart B accelerates...

Im not really good at this but i tried: vf^2 = vi^2 + 2a Δd vf^2/2a = vi^2 + Δd am i doing this right? I just want to know how to get rid of vf^2/2a so i can isolate 2a.

Homework Statement theres two questions actually. 1) a boat increases its speed from 5.0 m/s to 7.5 m/s over a distance of 50.0m. what it the boat's acceleration? 2) within 4.0s of liftoff, a spacecraft that is uniformly accelerating straight upward from rest reaches an altitude of...