robvba said:
tiny-tim said:Hi robvba!
Correct result … and it looks like you got it the right way, but I'm not sure.
This is a Newton's second law problem … you really shouldn't talk about the "force between" two bodies … each equation should only concern the forces on a particular body.
robvba said:
tiny-tim said:erm … I don't think you mean mA = -mB, do you?
I was thinking more of mass times acceleration = sum of forces …
you know the acceleration of block A, so the sum of forces on block A is … , and so the reaction force from block B on block A is … ?
A contact force is a force that occurs when two objects come into direct physical contact with each other. This type of force can either be attractive or repulsive, and is caused by the interaction between the surfaces of the two objects.
Unlike other types of forces, such as gravitational or electromagnetic forces, contact forces require physical contact between two objects in order to occur. These forces also act perpendicular to the surface of contact between the two objects.
The three blocks in a Three Blocks Contact force refer to three separate objects that are in contact with each other, creating a triangular shape. These blocks are typically labeled as block A, block B, and block C, with each block exerting a contact force on the adjacent blocks.
The magnitude of a Three Blocks Contact force is calculated by adding together the individual contact forces exerted by each block on the adjacent blocks. This is known as vector addition, where the direction and magnitude of each force must be taken into account.
Examples of Three Blocks Contact forces can be seen in situations where three blocks or objects are stacked or connected together, such as a tower of blocks or a cart being pushed by two people on either side. These forces can also be observed in sports, such as when a soccer player passes the ball to a teammate with their foot.