Monday

March 30, 2015

March 30, 2015

Posted by **justin** on Thursday, March 10, 2011 at 12:28am.

(a) Find the magnitude of the acceleration of the block.

(b) Find the coefficient of kinetic friction between the block and the incline.

(c) Find the magnitude of the frictional force acting on the block.

(d) Find the speed of the block after it has slid a distance 1.94 m.

- physics -
**drwls**, Thursday, March 10, 2011 at 1:03am(a) Solve X = (1/2)a t^2 to get the acceleration, a = 1.34 m/s^2

(b) If there were no friction, the acceleration would be g sin30 = 4.9 m/s^2. There must be an opposing friction force

Ff = M(4.9 - 1.34)= 10.7 N

(That answers part (c))

The coefficient of kinetic friction is

muk = Ff/M*g*cos30 = 0.364

(d) The final speed of the block (after moving 1.94 m) is twice the average speed. The average speed is

1.94/1.70 = 1.14 m/s

**Answer this Question**

**Related Questions**

Physics - A 2.84 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 2.01 kg block starts from rest at the top of a 25.8degree incline ...

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

Physics - A 2.42kg block starts from rest at the top of a 22.9◦ incline ...

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

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

physics - A 3.00-kg block starts from rest at the top of a 27.5° incline and ...

Physics - A 3.00-kg block starts from rest at the top of a 33.5° incline and ...