A 75 pound box rests on a perfectly smooth horizontal surface. Any horizontal force greater than zero will cause it to start moving. true or false
Expert Answers
lfryerda
| Certified Educator
| Certified Educator
calendarEducator since 2012
write738 answers
starTop subjects are Math and Science
Since the horizontal surface is perfectly smooth, then there is no way for a frictional force to prevent horizontal motion.
The box is at rest, and so the only force acting on it is the weight pulling it down to the table and the normal force acting against the weight of the box. The box is not falling into the table so the weight (W=mg) equals the normal force.
Elementary physics usually defines the force due to friction as `F=mu N` , where `mu` is the coefficient of friction. Since the surface is perfectly smooth, then `mu=0` .
Any non-zero horizontal force applied to the box will cause it to move.
Related Questions
- A box rests on the (horizontal) back of a truck. The coefficient of static friction between the...
- 1 Educator Answer
- A 150 N box is being pulled horizontally in a wagon accelerating uniformly at 3.00 m/s2. The...
- 1 Educator Answer
- What is the tension in the rope that connects the boxes? What is the mass m of the second box?...
- 1 Educator Answer
- A 2.29 kg block initially at rest is pulled to the right along a horizontal, frictionless...
- 1 Educator Answer
- True of False?: The tension in the cable must be greater than the weight of the elevator. An...
- 1 Educator Answer
Ask a Question
Popular Questions
- What do the letters R, Q, N, and Z mean in math?
-
1 educator answer
- How do I determine if this equation is a linear function or a nonlinear function?
-
8 educator answers
- Given f(x) and g(x), please find (fog)(X) and (gof)(x) f(x) = 2x g(x) = x+3
-
1 educator answer
- If you are traveling 50 miles at 60mph how long would it take you to get there????
-
1 educator answer
- Why is math such an important part of our lives?
-
8 educator answers