its been a year now I'm back . help please ? =D
hey guys it's been a while i haven't been on in a long time since last year when i last had physics 10 the introductory course and now I'm back just looking for guidance how to do this question ( helping friend :!) anyways
here it is:
A...
What is efficiency of a crane that uses 5.10 x 10 to the fifth power of energy to lift 1000kg a vertical height of 32.0 m ?
geez what formula do i use lol i tried using the heat energy formula but to no avail T_T someone offer help lol like what formula do i use?
a 55 kg high jump athlete leaps into the air in attempt to clear the bar, at the top of the leap the athlete has a total mechanical energy of 3x10 to the power of 10 joules and is moving at 8.33m/s.
Calculate the gravitational potentional energy.
what the hell? how do i get my height...
a 1.5 kg brick is dropped vertically onto a 2.5 kg toy truck, which is moving across a level floor at 0.80 m/s. With what velocity do the truck and brick continue to movie, after the brick has landed on the truck.
i've dealt with only horizontal movements andd i haven't covered this yet in...
Two frictionless discs on air table, initially at rest, are driven apart by an explosion with velocities of 9.0m/s and 5.0m/s what is ratio of masses?
how do i get masses if i don't know Momentum ? +__+
Errr
well iunno any of the answers of these questions but another question would be.. how come I'm alive and not dead lol =p or if I'm dead but i don't know it how am i alive? or if i were dead and not alive but almost alive but barely dead what would happen then ? =T OH and ...
how do u...