Physics

Inclined Planes Homework

1. A 350.0 N object is placed on a 40.0° inclined with a coefficient of friction of 0.250.  What will be the acceleration of the object as it slides down the plane?

2. A 100.0 N object slide down a 50.0° incline where the coefficient of friction is 0.990.  What is the acceleration of the object?

3. A 100.0 kg object slides down a 40.0° incline where the coefficient of friction is 0.350.  What force must be applied to allow it to slide at a constant velocity?

4. A 80.0 kg object is pushed up a 30.0° incline where the coefficient of friction is 0.320.  What applied force is necessary to push the object at a constant velocity?

5. A 400.0 N object is placed on a frictionless plane with an angle of 35.0°.  What is the velocity of the object after it slides a distance of 5.00 meters?  (Assume it started from rest.)

6. A 450.0 N object slides down a frictionless incline with an acceleration of 6.56 m/s2.  a) What is the angle of the incline? b) What is the coefficient of friction that would allow the object to slide down at a constant velocity?

7. A 70.0 kg object is pushed up a 25.0° incline with a force of 600.0 N.  The coefficient of friction is 0.300.  What is the acceleration of the object?

8. A 200.0 N object slides down an incline with an angle of 35.0°.  The coefficient of friction is 0.250.  How fast will it be going after 3.00 seconds?

Answers:  1.) 4.42 m/s2;        2.) 1.27 m/s2;                 3.) 367 N; Up the ramp        4.) 609 N

        5.) 7.48 m/s;                 6.) a. 42.0°   b. 0.901        7.) 1.77 m/s2;     8.) 10.8 m/s