Question

A .50kg (#1) cart is pulled with a 1.0 Newton force for 1.0 second; another cart (#2) with the same mass is pulled with a 2.0 Newton force for .50 seconds. Which cart has the greatest accleration? Explain.
a. Which cart has the greatest Impulse? Explain.
b. Which cart has the greatest change in momentum? Explain.

Answer 1

i got for part a.), Cart 2 because it has a larger force
and Cart #2 also has the greatest accleration because it has a greater force as well :)

Answer 2

Are we doing all your homework here? ;)

Use F = ma for first part , no times needed.
a) impulse = F x time
b) impulse IS the change in momentum as:
Impulse = ma x time
Impulse = m(change in v/t) x t
Impulse = m x change in v = change in momentum!

Answer 3

what would be the acceleration in the first part?

Answer 4

a=.5m/s?

Answer 5

It is cart #1 for all 3, yes.
To find out the numbers, use the F = ma formula
Cart #1:
a = F / m = 1 / 0.5
Cart #2:
a = F / m = 2 / 0.5

Answer 6

but cart #1 is 2 and cart #2 is 4 when i calculated so shouldn't it be cart #2 for all of dem?

Answer 7

sorry yes!! completely. that is excellent, showing you are following it (I am answering ther questions too.. (no excuse)).

Answer 8

so i use F=ma for all 3 to prove my answer? ^^

Answer 9

ok so what would be the acceleration

Answer 10

Just the first part (the acceleration).
part a) and b) are linked, they use the impulse formula (look above)

Answer 11

yeah so wats theacceleration? :)

Answer 12

look in the post where i said the wrong cart, i wrote it out for you!!

Answer 13

and you already worked them out..

Answer 14

wait so whats the acceleration for both carts???

Answer 15

so i can finish the equation F=ma

Answer 16

cart 1 is a = 2m/s/s, cart 2 is a = 4 m/s/s

Answer 17

wait so for part a.) and b.) it is both carts because
I= 1x 1= 1
I2= 2 x .5= 1 as well, and since u said Impulse is the same as momentum then both carts have same Impulse as well as same momentums :)

Answer 18

RIGHT? :D