Two constant forces act on an object of mass m = 5.60 kg object moving in the xy plane as shown in the figure below. force f1 is 27.5 n at 35.0°, and force f2 is 41.0 n at 150°. at time t = 0, the object is at the origin and has velocity (4.70i + 2.55j) m/s 150° 35.0 (a) express the two forces in unit-vector notation (b) find the total force exerted on the object. (c) find the object's acceleration m/s now, consider the instant t = 3.00 s (d) find the object's velocity m/s (e) find its position (f) find its kinetic energy from ½mvf2 (g) find its kinetic energy from ½mvi2 σf·

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Assume that two of the electrons at the negative terminal have attached themselves to a nearby neutral atom. there is now a negative ion with a charge -2e at this terminal. what are the electric potential and electric potential energy of the negative ion relative to the electron? the electric potential and the electric potential energy are both twice as much. the electric potential is twice as much and the electric potential energy is the same. the electric potential is the same and the electric potential energy is twice as much. the electric potential and the electric potential energy are both the same. the electric potential is the same and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron. the electric potential is twice as much and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron.

Atorque acting on an object tends to produce a. equilibrium b. rotation c. linear motion d. velocity e. a center of gravity