1. which of these is not a conservative force and does not have a form of potential energy connected with it? a. gravity b. electric attraction and repulsion c. friction d. magnetic attraction and repulsion 2. which of these is true about kinetic energy but not necessarily true about potential energy? a. the kinetic energy of an object is never negative. b. kinetic energy depends on position. c. kinetic energy increases with height. d. kinetic energy is a scalar.

If vx = 7.00 units and vy = -7.60 units, determine the magnitude of v⃗ . determine the direction of v⃗ .

Determine the fraction of the magnitude of kinetic energy lost by a neutron (m1 = 1.01 u) when it collides head-on and elastically with a target particle at rest which is 21h (heavy hydrogen, m = 2.01 u).

Aboat radioed a distress call to a coast guard station. at the time of the call, a vector a from the station to the boat had a magnitude of 45.0 km and was directed 15.0° east of north. a vector from the station to the point where the boat was later found is = 30.0 km, 15.0° north of east. what are the components of the vector from the point where the distress call was made to point where the boat was found? in other words, what are the components of vector c = b - a?