Recent content by allstar1

anyone?

work is show to my answers.

angular velocity help! Hi, I need help with the following 2 questions. My answers have ********* next to them. Any help is appreciated. Thank you. 1. A disk is rotating at a constant rate about a vertical axis through its center. Point Q is twice as far from the center of the disk as...

i agree with you. on question 1 and believe that only momentum is conserved. As for question 2, since it asks for inelastic collisions, i guess we have to assume that kinetic energy is not conserved at all.

Hi, I need help witht these 2 questions. My answers have *********** next to them. Any help is appreciated. Thanks. 1. A rocket is propelled forward by ejecting gas at high speed. The forward motion is a consequence of Choices: a) conservation of energy. b) conservation of...

I see you point, then since the The car's kinetic energy decreases. And The energy of the car/road/air system is constant, Can we say that Heat is also generated, since like you said that "energy doesn't just disappear. It is transformed into other forms, such as thermal energy." So heat in...

isn't the energy always constant and conserved. So as thr kinetic energy decreases, it becomes (turns) into potential energy and visa versa?

In question 4 I think that A) is true, but i don't think that C) is true because i don't believe that "The energy of the car/road/air system is constant," since the question specifies that the car slows down as a result of air friction. Due to air friction i think that choice C) is FALSE.

this question is very tricky

i would think the Kinetic energy decreases since KE=mv2/2, so if velocity decreases shouldn't the KE decrease?

anyone?

My answers have ******** next to them. 1. A woman holds a bowling ball in a fixed position. The work she does on the ball Choices: a) depends on the weight of the ball. b) cannot be calculated without more information. c) is equal to zero. ************************ 2. When...

Thanks for the reply.

any has any info they can share?

I need help with these 2 force questions. My answers have ***** next to them. 1) An object in equilibrium Choices: a) does not move. b) has no forces acting on it. c) has 0 accelleration. *************** d) two of the above e) all of the above An object in equilibrium...