## anonymous 4 years ago A 1.5kg dynamics cart is fastened by a horizontal cord over a pulley at the edge of a table to a mass of 0.50 kg. The frictional resistance in the wheels and pulley is 1.2N. Calculate the acceleration of the cart.

1. anonymous

can you draw a free body diagram as well. It might help me understand the question especially where the mass is.

2. TuringTest

You know, I never looked a pulleys very much. I should do so. Right now I can't solve your problem though, sorry.

3. anonymous

lol yeah this thing confuses me. i dont know where the pulley is located

4. TuringTest

|dw:1327893896324:dw|this is the jist of the situation I think

5. TuringTest

so the force acting on the cart would be$F_g-f=m_ca$where m_c is the mass of the cart. Acceleration follows from that quickly, but I'm basically figuring this out from looking at it, so it may be wrong.

6. TuringTest

$F_g-f=m_ca\to a=\frac{mg-f}{m_c}=\frac{(0.5)(9.8)-1.2}{1.5}\approx2.5m/s^2$according to my calculations

7. TuringTest

here's something that's almost a free-body, but a free body diagram only makes partial sense to me here...|dw:1327894489825:dw|

8. TuringTest

forgot one, sorry:|dw:1327894650458:dw|