Uniform Accelerated Motion Concepts

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Questions and Answers

What physical quantity does the distance equation describe?

  • Acceleration
  • Velocity
  • Time
  • Distance (correct)

Which equation describes the final velocity of an object under uniform acceleration?

  • s = vt + 1/2at2
  • s = ut + 1/2at2
  • v = u + at
  • v = u2 + 2as (correct)

What is the key characteristic of uniform accelerated motion?

  • Instantaneous velocity changes
  • Constant acceleration (correct)
  • Variable acceleration
  • Changing direction

Which type of motion is exemplified by objects like free-falling objects and bicycles braking?

<p>Uniform accelerated motion (B)</p> Signup and view all the answers

How are the initial and final velocities related in uniform accelerated motion?

<p>Final velocity changes at a constant rate (B)</p> Signup and view all the answers

What type of motion does a free-falling object experience under the force of gravity?

<p>Uniform accelerated motion (D)</p> Signup and view all the answers

In uniform accelerated motion, how do the velocity graphs differ between uniform and non-uniform acceleration?

<p>Uniform acceleration graphs are straight lines, while non-uniform acceleration graphs are curved. (A)</p> Signup and view all the answers

What happens to the speed of an object in uniform accelerated motion as time progresses?

<p>It increases at a constant rate. (B)</p> Signup and view all the answers

Which equation describes the velocity of an object in uniform acceleration involving initial velocity, acceleration, and time taken?

<p>$v = u + at$ (B)</p> Signup and view all the answers

Which situation would not be an example of uniform accelerated motion?

<p>A car gradually slowing down at a traffic light (B)</p> Signup and view all the answers

What differentiates the motion of an object in uniform accelerated motion from moving at a constant velocity?

<p>In uniform accelerated motion, the velocity changes at a constant rate. (A)</p> Signup and view all the answers

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Study Notes

Uniform Accelerated Motion

Uniform accelerated motion refers to the motion of an object in a straight line with a constant acceleration and zero difference between initial and final velocities. In this type of motion, the velocity of an object changes at a constant rate, but it does not mean that the object moves at a constant velocity. Instead, uniform accelerated motion involves an object moving with an increasing velocity as time progresses.

Examples of uniform accelerated motion include:

  1. Free-falling object under the force of gravity: When an object is dropped from a height, it experiences a constant acceleration due to gravity, which makes the motion uniformly accelerated.

  2. Ball rolling down a frictionless slope: When a ball rolls down a sloped surface, it experiences a constant acceleration due to the force of gravity and the slope.

  3. Bicycle rolling downhill when the brakes are applied: When a bicycle rolls downhill, the brakes are applied to slow down the bicycle, which causes a constant acceleration and makes the motion uniformly accelerated.

The uniform acceleration graphs for uniformly accelerated motion are straight lines, while the non-uniform acceleration graphs are curved.

The motion of an object in uniform acceleration can be described by the following equations:

  1. Velocity equation: v = u + at, where v is the final velocity, u is the initial velocity, a is the acceleration, and t is the time taken by the object.

  2. Distance equation: s = ut + 1/2at2, where s is the distance, u is the initial velocity, a is the acceleration, and t is the time taken by the object.

  3. Final velocity equation: v2 = u2 + 2as, where v2 is the final velocity, u2 is the initial velocity, a is the acceleration, and s is the distance.

These equations are used to describe the motion of an object under uniform acceleration.

In conclusion, uniform accelerated motion is a type of motion where an object moves in a straight line with a constant acceleration and zero difference between initial and final velocities. It is characterized by the object's velocity changing at a constant rate, and examples include free-falling objects, balls rolling down slopes, and bicycles braking. The motion can be described using the velocity, distance, and final velocity equations.

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