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- 1. Multiple-choice5 minutes1 pt
A rubber block weighing 60. newtons is resting on a horizontal surface of dry asphalt. What is magnitude of the minimum force needed to start the rubber block moving across the dry asphalt?
Remeber32 N
40 N
51 N
60 N
- 2. Multiple-choice5 minutes1 pt
An 8.0-newton wooden block slides across a horizontal wooden floor at constant velocity. What is the magnitude of the force of kinetic friction between the block and the floor?
2.4 N
3.4 N
8.0 N
27 N
- 3. Multiple-choice15 minutes1 pt
MULTI STEP PROBLEM
For the diagram above shows a 4.0-kilogram object accelerating at 10. meters per second2 on a rough horizontal surface.
What is the magnitude of the frictional force Ff acting on the object?5.0 N
10. N
20. N
40. N
- 4. Multiple-choice3 minutes1 pt
When a 12-newton horizontal force is applied to a box on a horizontal tabletop, the box remains at rest. The force of static friction acting on the box is
0 N
between 0 N and 12 N
12 N
greater than 12 N
- 5. Multiple-choice15 minutes1 pt
If a 30-Newton force is required to accelerate a 2-kilogram object at 10 meters per second2, over a level floor, then the magnitude of the frictional force acting on the object is
0 N
10 N
20 N
30 N
