What kinetic energy does the sack have just before it strikes the floor?

-a 98.0 n sack of grain is hoisted to a storage room 50.0 m above the ground floor of a grain elevator. the rope being used to lift the sack of grain breaks just as the sack reaches the storage room.

How does the image distance (di) of a convex lens compare with the image distance of a concave lens? a. the image distance of the convex lens is positive, and that of the concave lens is negative. b. both are negative for a virtual image. c. both are positive for a virtual image d. the image distance of the convex lens is negative, and that of the concave lens is positive.

Waves that cause the most damage during an earthquake are a. surface waves c. s waves b. p waves d. ocean waves

Question 11 of 13 (1 point) jump to question: a stairway, ladder, or ramp must be present in excavations in which of the following situations? a. all trenches must have access/egress b. the trench is more than 15 feet wide but only 1 ½ feet deep c. the trench is more than 4 feet deep and the devices must be within 25 feet of all workers