# Calculate the force on 2 kg block?

We will need to directly use Newton's second and third laws to solve this problem.

Newton's third law states, in summary, that that if an object A imparts a force on another object B, then object B imparts an equal and opposite force on object A. This is loosely referenced as "every action has an equal and opposite reaction."

These equal and opposite forces constitute Newton's third law pairs or "action/reaction pairs." Note that in order for two forces to be third law pairs, they must act on different objects. For example, the normal force and force of gravity may be equal and opposite in various situations, but they act on the same object and therefore do not constitute an NIII pair.

In this particular situation, the NIII pair consists of the force of the 1 kilogram block on the 2 kilogram block, and the force of the 2 kilogram block on the 1 kilogram block. These forces are equal in magnitude, but one acts in the negative direction while the other acts in the positive direction. I will define to the right as the positive direction.

Let's set up statements of the net force on each block (NII). We'll only consider the parallel forces, as there is no net force perpendicular (blocks move horizontally, not vertically). Additionally, we will assume a frictionless surface since it has been denoted as "smooth."

For the 1 kg block:

For the 2 kg block:

The NIII pair cancels.

OR:

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To calculate the force on a 2 kg block, you need to know the acceleration acting on the block and then apply Newton's second law, which states that force equals mass times acceleration ((F = ma)).

Without knowing the specifics of the situation, such as the acceleration acting on the block, it's impossible to determine the force. If you provide more information about the acceleration or the circumstances surrounding the block, I can assist you in calculating the force.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

- A truck pulls boxes up an incline plane. The truck can exert a maximum force of #2,400 N#. If the plane's incline is #(2 pi )/3 # and the coefficient of friction is #5/3 #, what is the maximum mass that can be pulled up at one time?
- An object with a mass of #3 kg# is acted on by two forces. The first is #F_1= < 1 N , 4 N># and the second is #F_2 = < 2 N, -3 N>#. What is the object's rate and direction of acceleration?
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- If a #4 kg# object moving at #1 m/s# slows down to a halt after moving #90 m#, what is the friction coefficient of the surface that the object was moving over?
- A box with an initial speed of #8 m/s# is moving up a ramp. The ramp has a kinetic friction coefficient of #4/5 # and an incline of #( pi )/6 #. How far along the ramp will the box go?

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