Figure shows a light, inextensible string attached to a cart, which can slide along a frictionless horizontal rail aligned along the x axis. The left end of the string is pulled over a pulley of negligible mass and friction and fixed at height h=3m from the ground level. The cart slides from x_1=3sqrt3m to x_2=4m and during the move, tension in the string is kept constant at 50N. Find the change in kinetic energy of the cart in joules. (Use sqrt3=1.3)

Figure shows a light, inextensible string attached to a cart, which ca

1.	Figure shows a light, inextensible string attached to a cart, which can slide along a frictionless horizontal rail aligned along the x axis. The left end of the string is pulled over a pulley of negligible mass and friction and fixed at height h=3m from the ground level. The cart slides from x_1=3sqrt3m to x_2=4m and during the move, tension in the string is kept constant at 50N. Find the change in kinetic energy of the cart in joules. (Use sqrt3=1.3)
Answer» Solution :Displacement of the point A of the STRING `SQRT((3sqrt3)^2+(3)^2)-sqrt(4^2+3^2)=6-5=1m` `DELTAK=` Work DONE by tension `=50xx1=50J`