Horizontal Friction Problem Set
Get practice doing horizontal friction problems using our questions and solutions for support of your work here.
- For the quick check answers click in "Check Answers" below
- To see detailed solutions watch the video found on this page
1. How much force is required to first move a 20 kg wood crate on a wood floor?
2. How much force is required to keep a 20 kg wood crate moving at a constant velocity on a wood floor?
(Q3-7) 200 N of force is applied horizontally to a wood 65 kg box that is not moving on brick floor.Β (Use the coefficient of friction where necessary from the table above)
3. Does the box have static of kinetic friction?
4. How much frictional force does it have?
5. What is the normal force of the 65 kg box?
6. How much applied force is required to get the box moving?
7. How much applied force is required to keep the box moving at constant velocity after it first moves?
(Q8-9) A 7.5 kg box of unknown material is resting on a concrete floor.Β It requires 63 N of force to first start the box moving and 45 N of force to keep it moving at a constant velocity.
8. What is the coefficient of static friction of the unknown material and the concrete floor?
9. What is the coefficient of kinetic friction of the unknown material and the concrete floor?
Β (Q10-13) A 250 N rubber block on a concrete surface and is moving with 300 N of force is applied horizontally.Β The coefficient of kinetic friction is 0.8.
10. What is the net force on the rubber block?
11. What is the acceleration of the rubber block?
12. What would the final velocity of the rubber block be if this 250 N force were applied from rest for 1.5 seconds?
13. What would the final velocity of the rubber block be if this 250 N force were applied over 10 meters?
Q14-18) A 10 kg box is pulled with 170 N of force at an angle of 30Β° above the horizontal.Β The coefficient of kinetic friction between the floor and the box is 0.25.
14. What is the normal force on the box?
15. What is the force of friction on the box?
16. What is horizontal applied force on the box?
17. What is the net force on the box?
18. What is the acceleration of the box?
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