Question

12. Which of the following statements is correct for a particle moving in a horizontal circle with constant angular velocity?
A. The linear momentum is constant but the kinetic energy varies.
B. The kinetic energy is constant but the linear momentum varies.
C. Both kinetic energy and linear momentum are constant.
D. Both speed and linear velocity are constant.
E. Neither the linear momentum nor the kinetic energy is constant.

Answer 1

@oksuz_

Answer 2

@JFraser @ganeshie8

Answer 3

consider each option one at a time

Answer 4

ok .

Answer 5

can linear momentum be constant if the object is moving in a circular path?

Answer 6

can kinetic energy vary if the object is moving at a constant speed?

Answer 7

p = m x v

Answer 8

no K.E not varies K.E = 1/2 mv2

Answer 9

don't just give the formula, think about what the word "linear" implies, and how the object is moving IN A CIRCLE

Answer 10

I'm not getting your point :/

Answer 11

the object is moving in a circle. What does "linear" mean?

Answer 12

linear means in straight line

Answer 13

so, if the obect is moving in a circle, can its straight line momentum be constant?

Answer 14

yeah its linear momentum varies because object is moving in circle

Answer 15

correct. now think about the other options the same way. Not necessarily with a formula, just use the definitions of the terms, and compare it to the circular motion of the object

Answer 16

here the K.E is due to rotation so if rotational velocity constant then K.E is also constant .. the correct option is then B am I right ?

Answer 17

the correct option is B, you are correct

Answer 18

ty so much :)

Answer 19

B is correct linear momentum varies concentrate on the word linear (straight) the body is in circle