Question

of the work is done by a force on an object, then wich is true? of the object must change. does an equal amount of work on the force anv enerav appearina as heat. liaht. o A. The speed The work done is equal to the chang nest lioht the object plus equal to the change of total kinetic energy enerav . The object .The force cannot take energy away from must change height above the ground cting air 1. The muzzie elocity of a bullet fred from a new rifne io 100 moiso the alr haveavs rsistance A) 100 m. B) 5m. C) (100+ 5) m. D) (100 -5) m. E) None of the above leisanot end of one second a buliet is fred straight up 2.. A pot that falilts from a ledge and hits the ground 45 m below hit the A) 120 m/s C) 30 m/s. B) more than 120 m/s. D) 60 m/s 43. The n momentum of a omentum of a truck is increased by a factor of 2 ts weight does not change. Thus, A. its acceleration is doubled. B. its speed doubled. its speed increased byafactor of 4. Se l C. D. its kinetic energy doubled for orce F, acting for time T and over a distance D, gives impulse To get the the force to act orce to ame impulse using half the force, i would be necessary A. over a distance 2D B. over a distance 4D C. over half the distance D. D. for a time 2T E. for half the time T.

Answer 1