Monday

March 2, 2015

March 2, 2015

Posted by **Anonymous** on Tuesday, December 11, 2012 at 11:02pm.

a. How fast are they going at the bottom?

b. How long does it take them to go the 30 meters

- physics -
**Elena**, Wednesday, December 12, 2012 at 7:15amμ=0.14, s=30

m=160 kg

x: m•a= m•g•sinα - F(fr),

y: 0= - m•g•cosα +N.

F(fr)=μ•N= μ• m•g•cosα

m•a= m•g•sinα - μ• m•g•cosα

a= g(sinα - μ•cosα)

v=sqrt(2as)

t=v/a

**Answer this Question**

**Related Questions**

physics - A small girl and boy take a sled up to the top of a snow covered slope...

physics - A boy is sledding down a slope that is inclined at 30.0° with respect ...

physics - A 38.5 kg girl and a 57.0 kg boy are on the surface of a frozen lake, ...

physics - A 38.3 kg girl and a 55.4 kg boy are on the surface of a frozen lake, ...

Physics - A 43.3 kg boy and a 60.0 kg girl are on the surface of a frozen lake, ...

Physics please help!! - A 43.3 kg boy and a 60.0 kg girl are on the surface of a...

physics - The figure shows a girl and a boy each exerting a force to move a ...

physics - A 45 kg boy is holding a 12 kg pumpkin while standing on ice skates on...

physics - A boy is pushing his sled up a snowy slope. The sled has a mass of 20....

Physics -URGENT- - A 55 kg boy and a 37 kg girl use an elastic rope while ...