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Physics: Post your doubts here!
Yes. Displacement can decrease. But it shouldn't in your case. Tell me where the displacement is taken from -
Physics: Post your doubts here!
THX to u too. Also I found the spring constant thing from a friend -
Physics: Post your doubts here!
According to energy conservation law, total energy can never be changed. Energy can never be destroyed. When the object strikes anything. If it is an inelastic collision, the kinetic energy is given off at collision as sound energy or thermal energy or some other form of energy ( see.. energy... -
Physics: Post your doubts here!
How to add up spring constants? (springs in series and parallel) -
Physics: Post your doubts here!
Exaclty. There is already a force of mu acting ----> to stop the ball, momentum of mu acting <------- is needed. To make the ball go with mu in <----- direction, further momentum of mu is needed. mu + mu = 2mu <------ this way. As momentum is vector, if -----> is +, then <----- is -. So -2mu -
Physics: Post your doubts here!
The ball hits the wall with momentum of mu. Momentum is a vector. Lets consider "--->" to be positive. So the ball hits the wall with momentum mu. If the ball rebounds with same speed then it is elastic collision as KE is conserved. The resultant momentum has to be big enough to counteract the... -
Physics: Post your doubts here!
Young Modulus is same as material is same. Therefore as young's modulus = (f / a) * ( l /e). This can be used in both wires. (60*l)/((d^2) * 8 ) = (60 * (l /4))/(((d^2)/4) * e) where d = diameter l = original length e = extension to be found. when you simplify above... -
Physics: Post your doubts here!
Nope. If that's a velocity time graph then yeah.. But displacement should increase rapidly at first, then comparatively slowly. Should not decrease -
Physics: Post your doubts here!
You may or may not get marks depending on the examiner. You are specifically asked to test the relationship between T and r. Not T and (c - r). You better get rid of the brackets and plot a graph of T^2 against R. As y = mx + c, the equation can be rearranged so that you get : y = m... -
Physics: Post your doubts here!
I need very old past papers ( 1990 - 2000 ) . Any idea where to get them. I hear they are very hard and I would like to try them as I have finished all past papers that came from 2000. Another problem I face is that I never get above 30 for MCQ's (paper 1). I need at least 35. I have done all...