Video Tutorials
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![Picture](/uploads/2/6/2/1/26215381/published/kinematics-equations.png?1569872487)
Things You Need to Know
- "Uniform motion" refers to objects that have a constant velocity (acceleration is 0).
- The only formula that applies to uniform motion is v = d/t.
- "Uniformly accelerated motion" refers to objects that are accelerating (changing their velocity) at a constant rate.
- An acceleration of 5.0 m/s² [N] indicates that after each second, the velocity of the object increases by 5.0 m/s towards the north.
- It's important to recognize that if the object was initially heading with a south velocity, this acceleration of 5.0 m/s² would cause the object to slow down.
- The kinematics equations apply to these situations. The uniform motion equation v= d/t does NOT apply, however.
- Position-time graphs plot the displacement on the y-axis and the time on the x-axis.
- The slope of a section of a position-time graph is equal to the velocity of the object during that section.
- Velocity-time graphs plot the velocity on the y-axis and the time on the x-axis.
- The slope of a section of a velocity-time graph is equal to the acceleration of the object during that section.
- The area between the curve and the x-axis indicates the displacement of the object during that section.
- When dealing with 2D vectors, it's important to break the vector into x-components and y-components that can be added together separately.
- Projectile motion problems can be solved by making a bank of x-components and a bank of y-components.
- Your y-acceleration will be gravity.
- The only variable that will be the same in the x-direction and the y-direction will be the time.
- Some additional projectile motion tips:
- At the projectile's maximum height, vfy will be 0.
- If the projectile lands at the same height it was launched, consider dy = 0.
- If a projectile is launched horizontally, the given initial velocity is your vx, and viy = 0.
- If a projectile is launched vertically, the given initial velocity is your viy, and vx = 0.
Homework Assignment
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Kinematics Homework Assignment | |
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