Recent content by LHC_23

Well, the elevator floor would have moved a distance 10t. [ :D , I hadn't noticed that - I was just assuming a person (had to be a giant) took a penny out from his pocket and dropped it by mistake - I didn't assume the height of the elevator cage to be 4.9 m - Though I think that would...

I think I didn't really get your question - How do I express x in terms of "the height at which it was dropped, given the elevator's motion" ? Or rather : I don't know how to go about it - given my understanding of your question. EDIT : I still don't get how things would work from the ground...

@wintjc But then, I don't see the difference between dropping it outside or inside - if I am in the reference frame of the ground, do I ?

It would have traveled x = -10t + 4.9t2

@haruspex - From the reference frame of ground, it should be 10 m/s upward.

Well, here is what I what I thought : From the reference frame of the elevator - The initial velocity of the coin must be 0 - since they were both moving upwards with 10 m/s. Then I applied the equation x = 0.5*g*t2 - and plugging in x=4.9 m and g = 9.8 m/s2 - I got t = 1 s. From the...

Homework Statement A lift in which a man is standing is moving upwards with a speed 10 m/s. The man drops a coin from a height of 4.9 m and if g = 9.8 m/s2 - then after what time does the coin reach the floor. Homework Equations x = 0.5*g*t2 x = ut + 0.5*g*t2 The Attempt at...

Capacitor problem -- Calculate the heat in connecting wires Homework Statement A 5.0\muF capacitor is charged to 12 V . The positive plate of this capacitor is now connected to the negative terminal of a 12 V battery and vice versa. Calculate the heat developed in the connecting wires...

Homework Statement Two bodies of masses m_{1} and m_{2} and specific heat capacities s_{1} and s_{2} , are connected by a rod of length l and cross-sectional area A, thermal conductivity K and negligible heat capacity. The whole system is thermally insulated. At time t=0, the...

Yes, thrill3rnit3 , it is the same as 8th grader (As in the U.s.).

Would somebody please give me some good suggestions? I am in real need of Help!

Hello, I study in the 8th standard and am a fanatic about maths and physics. My knowledge in Math is upto Partial Differential Equations and I know physics upto Halliday-Resnick level. I don't know how to progress further. Could anybody please help ?

Homework Statement A motorboat going downstream overcame a raft at a point A; • = 60 min later it turned back and after some time passed the raft at a distance l = 6.0 km from the point A. Find the flow velocity assuming the duty of the engine to be constant. Homework...