Newton's laws multiple objects contact forces

In summary, three crates with masses of 29.8, 15.3, and 27.3 are arranged with an applied force of 910 N and a coefficient of friction of 0.277. The acceleration of all three masses is 9.85, and the acceleration of each block is the same. The contact force between M1 and M2 is unknown, and the contact force between M2 and M3 is also unknown.
  • #1
tigerwoods99
99
0

Homework Statement



Three crates are arranged. Their masses are m1=29.8, m2= 15.3, m3= 27.3. The applied force of 910 N is directed horizontally and the coefficient of friction is u= .277

WHAT IS THE MAGNITUDE OF THE CONTACT FORCE BETWEEN M1 and M2?
WHAT IS THE MAGNITUDE OF THE CONTACT FORCE BETWEEN M2 and M3

Homework Equations



?

The Attempt at a Solution



acceleration of the three masses = 9.85
 
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  • #2
Your answer for the acceleration of all 3 blocks looks correct. What's the acceleration of each block? Answer that question and then draw free body diagrams of the blocks and use Newton's laws for each block.
 
  • #3
isn't the acceleration the same?
 
  • #4
tigerwoods99 said:
isn't the acceleration the same?
yes, they are.
 

1. What are Newton's laws of motion?

Newton's laws of motion are three fundamental principles that describe the behavior of objects in motion. They were developed by Sir Isaac Newton in the 17th century and are still used to explain and predict the motion of objects today.

2. What is the first law of motion?

The first law of motion, also known as the law of inertia, states that an object at rest will remain at rest and an object in motion will continue to move in a straight line at a constant speed unless acted upon by an external force.

3. How do Newton's laws apply to multiple objects?

The laws of motion apply to multiple objects by describing how the forces between the objects affect their motion. Each object will experience an equal and opposite force when in contact with another object, and these forces will cause the objects to accelerate or change direction.

4. What are contact forces?

Contact forces are forces that act between objects only when they are in direct physical contact with each other. Examples of contact forces include friction, normal force, tension, and air resistance.

5. How do we calculate the net force on an object in contact with other objects?

To calculate the net force on an object in contact with other objects, we must consider all the individual forces acting on the object and add them together vectorially. This will give us the overall force acting on the object, which will determine its acceleration according to Newton's second law of motion (F=ma).

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