A physics student has a mass of 60 kg. She tosses a pencil to her classmate who is sitting 5 meters away. Her classmate has a mass of 75 kg. What is the gravitational force between the classmates? Please help!

The two required components for a generator

Under the action of a constant force an object accelerates at 7.8 m/s2. what will the acceleration be if (a) the force is halved? (b) the object's mass is halved? (c) the force and the object's mass are both halved? (d) the force is halved and the object's mass is doubled?

Avector of magnitude 2 cannot be added to a vector of magnitude 3 so that the magnitude of the resultant is a. zero b. 1 c. 3 d. 5 e. 7