What is the direction of a vector with an x component of 7.2 m and a y component of -15 m?

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

What is the magnitude of the acceleration vector which causes a particle to move from velocity −5i−2j m/s to −6i+ 7j m/s in 8 seconds. answer in m/s.

The protons in a nucleus are approximately 2 ✕ 10^−15 m apart. consider the case where the protons are a distance d = 1.93 ✕ 10^−15 m apart. calculate the magnitude of the electric force (in n) between two protons at this distance.