# Physics

posted by .

A 2.3 kg block slides down a 25° inclined plane with constant acceleration. The block starts from rest at the top. At the bottom, its velocity is 0.65 m/s. The incline is 1.6 m long.
What is the coefficient of friction?

• Physics -

Wb = m*g = 2.3kg * 9.8N/kg = 22.54 N. =
Wt. of block.

Fb = 22.54N @ 25o. = Force of block.
Fp = 22.54*sin25 = 9.53 N. = Force parallel to inclined plane.
Fv = 22.54*cos25 = 20.43 N. = Force perpendicular to plane = Normal.

a = (V^2-Vo^2)/2d
a = (0.4225-0)/3.2 = 0.132 m/s^2.

Fn = Fp-u*Fv = ma.
9.53-u*20.43 = 2.3*0.132 = o.304
-20.43u = 0.304-9.53 = -10.02 = -9.23
u = 0.45.

## Similar Questions

1. ### Physics

A block slides down a frictionless plane having an inclination of 14.3°. If the block starts from rest at the top and the length of this incline is 1.77 m, find the acceleration of the block. b)What is the block's speed when it reaches …
2. ### cary collage

"A 2.5-kg block slides down a 25 degree inclined plane with constant acceleration. The block starts from rest at the top. At the bottom, its velocity reaches 0.65 m/s. The length of the incline is 1.6m. a) What is the acceleration …
3. ### physics

A 20. kg block is placed at the top of a 10. meter-long inclined plane. The block starts from rest and slides without friction down the length of the incline. (A diagram shows a height of 5.0 m, the 10. m length of incline/hypotenuse …
4. ### physics

another question: the 20 kg block is at the top of a 10 m long inclined plane. The block starts from rest and slides without friction down the length of the incline. The block is 5 m high. 1) Determine the gravitational potential energy …
5. ### physics

A 2.0-kg wooden block slides down an inclined plane 1.0 m high and 3.0 m long. The block starts from rest at the top of the plane. The coefficient of kinetic friction between the block and plane is 0.35. What is the speed of the block …
6. ### physics

A 2.5-kg block slides down a 17.0° inclined plane with constant acceleration. The block starts from rest at the top. At the bottom its velocity reaches 0.70 m/s. The length of the incline is 1.7 m. What is the acceleration of the …
7. ### Physics

A block slides down a frictionless plane having an inclination of 18.9deg. If the block starts from rest at the top and the length of this incline is 2.21m, find the acceleration of the block. b). What is the block's speed when it …
8. ### physics

A 2.6 kg block slides down a 25° inclined plane with constant acceleration. The block starts from rest at the top. At the bottom, its velocity is 0.75 m/s. The incline is 1.6 m long. (a) What is the acceleration of the block?
9. ### Physics

A 2.6 kg block slides down a 25° inclined plane with constant acceleration. The block starts from rest at the top. At the bottom, its velocity is 0.80 m/s. The incline is 1.6 m long. (a) What is the acceleration of the block?
10. ### physics

An 8kg block starts from rest from the top of a plane, inclined at 40o with respect to the horizontal, and slides down at a constant acceleration. If the coefficient of kinetic friction between the block the plane is 0.35 determine …

More Similar Questions

Post a New Question