What is the net force on the block immediately after it starts to slide?

Click For Summary
SUMMARY

The net force on a block immediately after it starts to slide can be determined by analyzing the forces acting on it. Given a coefficient of static friction of 0.40 and a mass of 5.0 kg, the static friction force is calculated using the formula: static friction force = coefficient of static friction × normal force. The normal force in this case equals the weight of the block, which is 5.0 kg × 9.81 m/s², resulting in a static friction force of 19.62 N. Once the block begins to slide, the net force acting on it is equal to the applied force minus the kinetic friction force, which is 0.15 × normal force.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Knowledge of friction coefficients (static and kinetic)
  • Ability to calculate normal force
  • Familiarity with free body diagrams (FBD)
NEXT STEPS
  • Learn how to calculate normal force in various scenarios
  • Study the differences between static and kinetic friction
  • Explore the concept of net force in dynamics
  • Practice solving problems involving friction and motion
USEFUL FOR

Students studying physics, particularly those focusing on mechanics and dynamics, as well as educators looking for examples of friction-related problems.

AIMheels22
Messages
1
Reaction score
0

Homework Statement



The coefficient of static friction between a block and a horizontal floor is 0.40, while the coefficient of kinetic friction is 0.15. The mass of the block is 5.0 kg. A horizontal force is applied to the block and slowly increased. What is the value of the applied horizontal force at the instant that the block starts to slide?

What is the net force on the block immediately after it starts to slide?


Homework Equations





The Attempt at a Solution



I am absolutely stumped by this problem! After a FBD i don't really know where to start, Please some one help me!
 
Physics news on Phys.org
The instant the block starts to slide the applied force will be equal to the static friction force. How do you work out the static friction force?
 

Similar threads

Newton's law problem: Pushing 2 stacked blocks on a horizontal table
  • · Replies 13 ·
Replies
13
Views
3K
Forces/Dynamics: A block sliding on a plate
  • · Replies 45 ·
2
Replies
45
Views
8K
Net Force acting on block on incline
  • · Replies 1 ·
Replies
1
Views
2K
Newton's laws — Two stacked blocks sliding on a frictionless floor
  • · Replies 17 ·
Replies
17
Views
4K
How much force does the 20 kg block exert on the 10 kg block?
  • · Replies 17 ·
Replies
17
Views
2K
Coefficient of kinetic friction of a block sliding across the ceiling
  • · Replies 7 ·
Replies
7
Views
2K
Friction: what is the net force on the block the instant that it starts to slide
  • · Replies 5 ·
Replies
5
Views
8K
Physics Homework -- block pressed against a wall is sliding....
  • · Replies 4 ·
Replies
4
Views
4K
What is the displacement of a 3.0 kg block sliding down an inclined plane?
  • · Replies 12 ·
Replies
12
Views
2K
Can a 10N Force Overcome Friction to Move a 10kg Block?
  • · Replies 2 ·
Replies
2
Views
2K