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the chain is ?.find the work done by the friction during the period the chain slips off the table?friction coeff =0.2 g=10m/s L=2m and m=16kg

^{1/2}from top of a smooth hemisphere. If the particle starts slipping from the highest point, then the horizontal distance between the point, then horizontal distance between point where it leaves contact with sphere and the point at which the body was placed isAnswer is R(7)

^{1/2 }/4 can you explain how ?a) e

^{2}h b) eh^{2 }c) e^{4}h d) h/e^{4}The half life of a certain radioactive material against alpha decay is 100 days . after how much time will the undecayed fraction of material will be 6.25%? i saw many solutions but still not clear about it...thus plzz help me properly..how N=n0/2 and {1/2} to the power n...NOT GETTING AT ALLPLEASE HELP!!

^{3 }and g=10m/s^{2 }then the p ower of heart in watt is ;m= 1 kg moving on a horizontal surface with speedv= 2 ms_{i}^{–1}enters a rough patch ranging fromx= 0.10 m tox= 2.01 m. The retarding forceF_{r}_{ }on the block in this range is inversely proportional toxover this range${F}_{r}=\frac{k}{x}$ for 0.1 <

x< 2.01 m= 0 for

x< 0.1 m andx> 2.01 mwhere

k= 0.5 J. What is the final K.E. and speedvof the block as it crosses the patch?_{f}_{ }$\nu $

Q. A uniform chain of mass M and length L is kept on a table. Suppose $\frac{\mathrm{L}}{\mathrm{n}}$ length hangs down the table, what work has to be done by the applied force and gravity in order to pull the chain up the table.

^{-1.the total energy imparted bto tht 2 fragments is.....could be also explain the language of the ques as exactly whatis it asking?thankkew}Q.

In the system shown above, the body displaces by 2 m when 50 N face is applied to the string.

i. Work done by the applied force?

a. 20 N b. 60 N c. 30 N d. 0 N

ii. Work done by tension on the body?

a. 20 N b. 70 N c. 39.2 N d. 100 N

Find v of 3

^{rd}ball after collision. When coeff of restitution is e.Example 15. A running man has half the KE that a boy of half his mass has. The man speeds up by $1\xb70m{s}^{-1}$ and then has the same energy as the boy. What were the original speeds of the man and the boy?

^{2}jBody is taken from (-1,2) to (1,3)

Find the work done

i am not understanding the applications from work energy and powerA smooth sphere of mass

Mmoving with velocityudirectly collides elastically with another sphere of massmat rest. After collision their final velocities areVandvrespectively. The value ofvisOptions:This part is from about 1:44:00 minutes of the recording.