Wednesday

July 30, 2014

July 30, 2014

Posted by **Alex** on Sunday, October 21, 2012 at 5:01pm.

Answer in units of m/s2

b) What is the coeﬃcient of kinetic friction

between the blockand the incline?

c) What is the magnitude of the frictional

force acting onthe block?

Answer in units of N

d)What is the speed of the block after it slides

the distance of 2.41?

Answer in units of m/s

- Physics -
**bobpursley**, Sunday, October 21, 2012 at 5:35pma. you know the final speed (twice average). Vf=2*2.41m/2.14s

Vf^2=Vi^2+2ad solve for acceleration a.

b. do energy concepts

KEfinal=KE initial + PEinitial-PEfinal-Frictionenergy

or

1/2 m vf^2=0 + mg 2.41/sinTheta -0-friction energy

solve for friction energy

then, Frictionenergy=mu(mg*cosTheta)

solve for mu.

c. friction energy=force*distance solve for force.

d. See a.

- Physics -
**Alex**, Sunday, October 21, 2012 at 5:56pmCan you tell me the answer for c and d. I got the one for a and b correct but c says it's not correct. I put 21.96N.

**Related Questions**

physics - A 2.67 kg block starts from rest at the top of a 27.6 incline and ...

Physics - A 2.01 kg block starts from rest at the top of a 25.8degree incline ...

physics - A 3.00 kg block starts from rest at the top of a 30° incline and ...

Physics - A 2.90 kg block starts from rest at the top of a 30° incline and ...

Physics - A 2.90 kg block starts from rest at the top of a 30° incline and ...

Physics - A 2.86 kg block starts from rest at the top of a 27.5◦ incline ...

physics - A 3.00kg block starts from rest at the top of a 30.0 degree incline ...

Physics - A 4.29 kg block starts from rest at the top of a 31.8 degrees incline ...

physics - A block is at rest on the incline shown in the figure. The ...

Physics - A 3.00-kg block starts from rest at the top of a 25.5° incline and ...