Focal distance of a concave lens is always: O A. smaller than the image distance.
O B. positive.
O C. negative.
O D. larger than the object distance.

In a load, the load is paralel to the shaft. n a. angular n b. thrust n c radial n d. none of the above

10 newton object is placed 3 meters from the fulcrum. at what distance on the other side would you need to place a 15 newton object to balance the lever? show your work!

A14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.