Question

gravel is falling on a conveyor belt at the rate of 12kg per second , the extra power required to move the belt with a velocity of 5m/s is???

Answer 1

Do you have any idea?

Answer 2

yes, i do

Answer 3

power is work divided by time...the time is essentially one second, the Force is 12kg and the distance is 5 meters..therefore, the power is 60 joules a second

Answer 4

Well, 12 kg is not a force, but knowing the mass and the velocity will allow you to find some new quantity.

Answer 5

yah i kno it isn't but Force is mass multiplied by acceleration and since acceleration is per second, it still is 12

Answer 6

and besides what do you mean by new quantity? like momentum?

Answer 7

oops actually the FORCE is 60 so it would take 300 joules a second

Answer 8

wait what's the distance then? it didn't state in the question

Answer 9

wait, it's 5 meters

Answer 10

so the answer is 300 JOULES A SECOND

Answer 11

Yes, 300 watts is correct.

Answer 12

just so u know, I'm actually Will-i-am so YAY i got it right! wait..if u knew that was the right answer why did n't you just say that in the beginning?

Answer 13

i am just 12 by the way

Answer 14

i feel like a boss for solving that problem

Answer 15

yup, a boss

Answer 16

Well, If you are a boss, can you compute the rate of increase in kinetic energy produced a explain the paradox that arises ?
;-)

Answer 17

From earth, this is fine because neither speed exceeds c, but if you take the ... although all the clocks in a given inertial frame will run at the same rate. ... appropriate to change delta t and delta x to a different frame, you would find .... The equivalent Newtonian equation for the kinetic energy (energy of motion) is E = 1/2 m v2.