What is the work required to raise a 10. kg object from the surface of the earth to a height of 2.0 m?
a. 5.0 j
b. 20. j
c. 2.0 e2 j
d. 2.0 e3 j

Free runners jump long distances and land on the ground or a wall. how do they apply newton’s second law to lessen the force of impact?

Asher cycles 12 miles in 16 hours. what is his speed?

Examine the equation. 23490th→23088ra+42he what kind of barrier would you need to block the radioactive particles from this reaction? a.a piece of paper b.a sheet of aluminum foil c. a two-inch block of lead d. a solid concrete block