A rock accelerates down a hill at 7 m/s2 with a force of 30.0 N. What is the mass of the rock?

If forces acting on an object are unbalanced, which factors may result fron an unbalanced force? check all that apply

Aray of light traveling parallel to the principal axis of a concave mirror will be reflected through the mirror's

Two students, each riding bicycles, start from the same apartment building and ride to the same building on campus, but each takes a different route. the first student rides 1100 m due east and then turns due north and travels another 1430 m before arriving at the destination. the second student heads due north for 1930 m and then turns and heads directly toward the destination.at the turning point, how far is the second student from the destination?