AP EAMCET202123 Aug 2021Evening ShiftPhysicsLaws of MotionActual
A small sphere is hung by a string fixed to a wall as shown in the figure. The sphere is pushed from the wall by a stick. The forces acting on the sphere are as shown. Then, identify the incorrect expression.
Options
- AP=W
- BT=P+W=0
- CT^2=P^2+W^2
- DT=P+W
Correct answer
D. T=P+W
Step-by-step solution
aligned & i.e., F_x=0 & P-T =0 aligned P=T ...(i) and F_y=0 W-T =0W=T ...(ii) By dividing Eq. (i) by Eq. (ii), we get P W = T T P=W and their vector sum is also zero. i.e. T + P + W =0 Resultant of P and W is also equal and opposite to tension T T^2=P^2+w^2 That's why, equation T=P+W is the only incorrect expression.