No, the teacher didn't give me the answers, and I don't know how to take in consideration the weight since I'm already using the energy of the spring minus the speed, I thought that gravity was done for? :confused:
I've understood everything now, thanks Dweirdo!
But now I've got one small question and one big one! (Hope I'm not getting on your nerves :P)
1.- An elevator(920 kg) is being hanged from a rope until it breaks from a height of 28 m upon a big spring (k= 2200000N/m) at the bottom.
a)Work done...
1. A skier parts from 0 and slides down an inclined plane of 22° with a length of 75 meters.
a)If μ is 0.09 ¿What's the velocity at the end of the plane
b)If the snow is equal to the friction of the plane ¿How far will he go before stopping?
2.Ep = mgh
Ec = 1/2 m(v²)
Wt = Ec - Ep...
the slope is above the ground, haha, so he goes up 12.2 before reaching the top... mmm, I guess I'm understanding.
Thanks, I have several problems but I guess with this explanation I will try to answer them again correctly this time.
1. A skier has an initial velocity of 12.0 m/s, after a while reaches a slope with 18° of inclination and he slides upwards 12.2m before reaching 0
¿What is the coefficient of friction? "μ"
Vi= 12.0 m/s
Vf= 0 m/s
Distance = 12.2 m
2. Ec = 1/2 m(v²)
Wt = Ec(final) - Ec (initial)
3. Wt =...
Thanks! Let me talk to my partners about this but definitely a good idea.
But I guess the surface must be as smooth as it can be (in the inclined plane that proves that acceleration of gravity is the same but can be slowed down by the inclination).
1. I must present an experiment for middleschool children about Uniform Acceleration or paraboles to teach them how it works.
I've tried some stuff but maybe to complicated to fabricate or reproduce, for example, I wanted to do a catapult that made a small parabole and predict where it...