(82/II/ 3)
A particle is in motion with a constant force acting on it. Which of the following physical quantities will be changing during the time when the force is acting?
(1) acceleration of the particle
(2) momentum of the particle
(3) kinetic energy of the particle
A (1)
B (3)
C (1) and (3)
D (2) and (3)
E (1),(2)and (3)
PLEASE HELP ME AND EXPLAIN!!!!!!!!!!!!!!!!!!!!
f.4 physics
2007-08-12 4:39 am
回答 (1)
2007-08-12 6:46 am
✔ 最佳答案
D (2) and (3)(1)acceleration would not change because the force is constant , it does not increase or decrease (F=ma)
(2)and(3)the velocity of the particle is increasing because there is a net force acting on it , so the kinetic energy is increasing too
as the velocity is increasing , the momentum is also increasing because (p=mv)
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