Physics Past Questions and Answers

THe diagram above shows a plank RS pivoted its center of gravity O and is in equilibrium with the weight P and Q. If a weight 2P is added to P the plank will be in equilibrium again by

The efficiency of the pulley system shown above is 80%. find the effort E required to lift the load of 1200N

The diagram above is the heating curve for a solid QR is the

The above figure shows the motion of a progressive wave along a string. The particle motion of the medium is in direction

If a convex lens of focal length 12cm is used to produce a real image four times the size of the object, how far from the lens must the object be placed?