An object of mass 80 kilograms is placed on an inclined plane that makes 20

degrees with the horizontal. The coefficient of friction is 0.25. Calculate

(a) the normal reaction of the plane on the object

(b) the frictional force

g=10m/s^2

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Related questions

An object of mass 8 kilograms is on a smooth plane inclined at 35 degrees to the

horizontal (friction is zero). Initially the object is moving down the plane with a

velocity of 12 metres per second. Calculate

(a) the acceleration of the object down the plane.

(b) the distance down the plane the object travels in 7 seconds

bluecockroach902

An object of mass 10 kg is placed on a plane inclined at an angle of 30 degrees

to the horizontal. The coefficient of kinetic friction between the object and the

plane is 0.12. The object is initially moving down the plane with a velocity of

4 metres per second. Calculate

(a) The acceleration of the block down the plane

(b) The distance the object moves down the plane in the first five seconds.

bluecockroach902

1. A block is placed on a plane whose angle of inclination is 30˚. The coefficients of static and kinetic friction for the block on the inclined plane are both 0.2. The block
(A) remains stationary on the inclined plane.
(B) accelerates down the inclined plane.
(C) travels down the inclined plane at a constant velocity.
(D) travels up the inclined plane at a constant velocity.
(E) accelerates up the inclined plane.

2. An object with a mass of 5.5 kg is allowed to slide from rest down an inclined plane. The plane makes an angle of 30˚ with the horizontal and is 72 m long. The coefficient of friction between the plane and the object is 0.35. The speed of the object at the bottom of the plane is?

3. A 5-kg object slides down a frictionless surface inclined at an angle of 30˚ from the horizontal. The total distance moved by the object along the plane is 10 meters. The work done on the object by the normal force of the surface is?

4. A mass m = 2.5 kg is sliding along a frictionless table with initial speed v as shown in the figure. It strikes a coiled spring that has a force constant k = 500 N/m and
compresses it a distance x=5.0 cm. The initial speed v of the block was..?

5. The graph shows how the position of a particle depends on time. Which choice is closest to the instantaneous speed of the particle at t = 3s?
(A) 0.40 m/s
(B) 0.67 m/s
(C) 0.75 m/s
(D) 1.50 m/s
(E) 2.22 m/s

6. Calculate the work done by a force, F = 2x i, along the
path (0, 0) -> P₁(2, 0) -> P2(2, 2).