# physics

posted by .

a 25.0kg box is released from rest on a rough inclined plane tilted at an angle of 33.5 degrees to the horizontal. the coefficient of kinetic friction between the box and the inclined plane is 0.200. determine the force of kinetic friction acting on the box. determine the accelleration of the box as it slides down the inclined plane

• physics -

Wb = mg = 25kg * 9.8N/kg = 245 N. = Wt.
of block.

Fb=245N. @ 33.5 Deg. = Force of block.
Fp = 245*sin33.5 = 135.2 N. = Force in
parallel to inclined plane.
Fv = 245*cos33.5 = 204.3 N. = Force perpendicular to inclined plane.

a. Fk = u*Fv = 0.2 * 204.3 = 40.9 N =
Force of kinetic friction.

b. Fn = Fp - Fk = ma.
135.2 - 40.9 = 25a.
94.34 = 25a.
a = 94.34 / 25 = 3.77 m/s^2.

## Similar Questions

1. ### physics

A box of weight 2N accelerates down a rough plane that is inclined at an angle 30 degrees above the horizontal. The normal force acting on the box has a magnitude 1.7 N, the coefficient of kinetic friction between the box and the plane …
2. ### physics

A wooden box with a mass of 10.0kg rests on a ramp that is inclined at an angle of 25 degrees to the horizontal. A rope attatched to the box runs parallel to the ramp and then passes over a frictionless pulley. A bucket with a mass …
3. ### physics

a 100Nforce was applied to pull a 20 kg box up on a rough inclined plane that makes ans angle of 30. if the applied force makes an angle of 20 with the inclined plane the find the coefficient of friction when the accleration of the …
4. ### Physics

a 25 kg box is released from rest on a rough inclined plane tilted at an angle of 33.5 degrees to the horizontal. The coefficient of kinetic friction between the box and the inclined plane is 0.200. a. determine the force of kinetic …

A box of weight w=2.0 N accelerates down a rough plane that is inclined at an angle 30 degrees above the horizontal. The normal force acting on the box has a magnitude n= 1.7 N, the coefficient of kinetic friction between the box and …
6. ### physics

A 15.0-kg box is released from rest on a rough inclined plane tilted at an angle of 45° to the horizontal. The coefficient of kinetic friction between the box and the inclined plane is 0.200. What is the force of kinetic friction …
7. ### Physics

A 20 kg box approaches the foot of a 30 degree inclined plane with a speed of 10 m/s. the coefficient of friction between the box and the inclined plane is 0.2. (a) How far up the inclined plane will the box go?
8. ### Physics 101

A 25 kg box rests on an inclined plane which is 30o to the horizontal. The coefficient of sliding friction between the box and the plane is 0.30. Determine the acceleration of the box down the plane. (9.8 m/s2)
9. ### Physics

When a force of 500 N pushes on a 25-kg box, the acceleration of the box up the incline is 0.75 m/s^2. If the inclined plane makes an angle of 40 degrees relative to the horizontal level, what is the coefficient of kinetic friction?
10. ### Physics

A 42-kg box slides down a frictionless inclined plane. The angle of the inclined plane is 34.0 degrees. The distance from the box to the bottom of the inclined plane is 3 m. Draw the free body diagram of the force vectors acting on …

More Similar Questions

Post a New Question