Work done by Tension Ques: Friction 0.5n

[naman0804]

ques: how fast block moves after sliding 100 cm on incline?[by energy conservation]
A frictional force of 0.5 n actsdoubt: should work done by tension be accounted?

 

[Spinnor]

Did you give us all the information that you were given?

 

[naman0804]

yes i did ... i just want to know if tension does work

 

[Spinnor]

Before the block moves you can set the total energy to zero, after the block has moved 1m the total energy is still zero and is,

0 = .5N X 1m + mV^2/2 - mgh = force times distance + kinetic energy - potential energy

where h is the vertical distance the block falls.