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ssm A $1380-\mathrm{kg}$ car is moving due east with an initial speed of 27.0 $\mathrm{m} / \mathrm{s}$ . After 8.00 $\mathrm{s}$ the car has slowed down to 17.0 $\mathrm{m} / \mathrm{s}$ . Find the magnitude and direction of the net force that produces the deceleration.

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1730 $\mathrm{N}$ west

Physics 101 Mechanics

Chapter 4

Forces and Newton’s Laws of Motion

Newton's Laws of Motion

Applying Newton's Laws

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03:28

Newton's Laws of Motion are three physical laws that, laid the foundation for classical mechanics. They describe the relationship between a body and the forces acting upon it, and its motion in response to those forces. These three laws have been expressed in several ways, over nearly three centuries, and can be summarised as follows: In his 1687 "Philosophiæ Naturalis Principia Mathematica" ("Mathematical Principles of Natural Philosophy"), Isaac Newton set out three laws of motion. The first law defines the force F, the second law defines the mass m, and the third law defines the acceleration a. The first law states that if the net force acting upon a body is zero, its velocity will not change; the second law states that the acceleration of a body is proportional to the net force acting upon it, and the third law states that for every action there is an equal and opposite reaction.

03:43

In physics, dynamics is the branch of physics concerned with the study of forces and their effect on matter, commonly in the context of motion. In everyday usage, "dynamics" usually refers to a set of laws that describe the motion of bodies under the action of a system of forces. The motion of a body is described by its position and its velocity as the time value varies. The science of dynamics can be subdivided into, Dynamics of a rigid body, which deals with the motion of a rigid body in the frame of reference where it is considered to be a rigid body. Dynamics of a continuum, which deals with the motion of a continuous system, in the frame of reference where the system is considered to be a continuum.

01:44

A 1380-kg car is moving du…

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02:23

ssm mmh A 1580-kg car is t…

02:30

A 1580-kg car is traveling…

01:45

(a) Find an equation to de…

01:03

A car is traveling west at…

01:10

A $1500 \mathrm{kg}$ car i…

01:11

A car is traveling east at…

01:55

A car is traveling due nor…

to sum of the squares, and we have to begin by discovering what is the deceleration off the car. For that, we can use the definition off acceleration, which is a variation velocity divided by the time it takes. The variation in velocity is given by the final velocity, minus the initial velocity and the time it takes eight seconds. Then we see that we have minor stand divided by eight and easiest the deceleration off the car. Now we can use Newton's second law discover what is the force that is producing these deceleration? Using Newton's second law in these access, we have the following in that force, acting in the car. Is he close to the mask off the car times its acceleration so and that force acting on the car is equals to 100,380 times my understand divided by eight. And these results in the net force off approximately minus 1730 Newtons, then the magnitude off the force is 1730 New terms on this force is pointing to the West, so it's pointing in this direction these eastern that force acting on the car that is producing its deceleration

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01:59

Learning Task 5 Study the materials inside the box. Choose two materials…