Motion with Constant Acceleration
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Questions and Answers

At what angle does a projectile have its maximum range in the absence of air resistance?

  • 90°
  • 45° (correct)
  • 60°
  • 30°

    • What is the value of acceleration due to gravity when an object is hit vertically upward and reaches the highest point?

  • -10.2 m/s²
  • -9.8 m/s² (correct)
  • -9.5 m/s²
  • -11.0 m/s²

    • Which of the following statements is true about momentum?

  • A large, slow moving object has greater momentum than a small, fast moving object.
  • Momentum is inversely proportional to the object's mass and velocity.
  • A small, fast moving object has greater momentum than a large, slow moving object.
  • A large, fast moving object has greater momentum than a smaller, slower object. (correct)

    • What is the term used to define mass in motion?

    <p>Momentum</p> Signup and view all the answers

    What is the distance covered by an airplane accelerating at 3.2m/s² for 32.80s?

    <p>1721.34 m</p> Signup and view all the answers

    What does the law of conservation of momentum state?

    <p>The total momentum of a closed system remains constant.</p> Signup and view all the answers

    What is the unit of impulse in the SI system?

    <p>N s</p> Signup and view all the answers

    If the velocity of an object is doubled, what happens to its momentum?

    <p>It is doubled</p> Signup and view all the answers

    What is the gravitational potential energy of an object dependent on?

    <p>Its height from the ground</p> Signup and view all the answers

    What is the difference between speed and velocity?

    <p>Speed is the rate of change of distance, while velocity is the rate of change of displacement</p> Signup and view all the answers

    What is the average acceleration of an object that changes its velocity from 0 to 10 m/s in 5 seconds?

    <p>2 m/s^2</p> Signup and view all the answers

    What is the constant value of acceleration due to gravity?

    <p>-9.8 m/s^2</p> Signup and view all the answers

    Study Notes

    Uniformly Accelerated Motion

    • Uniformly Accelerated Motion refers to the motion of an object with constant acceleration.

    Projectile Motion

    • A projectile has its maximum range when fired at an angle of 45°.
    • The path of a projectile follows a parabolic curve.

    Momentum

    • Momentum is directly proportional to an object's mass and velocity.
    • A large, fast-moving object has greater momentum than a smaller, slower object.
    • Momentum can be calculated by multiplying an object's mass and velocity.

    Impulse and Collisions

    • Impulse refers to a fast-acting force or impact.
    • The SI unit of impulse is kg m/s.
    • A rebound refers to a special type of collision involving a direction change in addition to a speed change.

    Energy

    • The Law of Conservation of Energy states that energy cannot be created or destroyed, only converted from one form to another.
    • Kinetic energy is the energy of motion, directly proportional to the square of an object's speed.
    • Potential energy increases with height, so the higher an object is from the ground, the greater its potential energy.

    Motion

    • Speed is a scalar quantity, defined as the rate of change of distance.
    • Velocity is a vector quantity, defined as the rate of change of displacement.
    • Acceleration is the rate of change of velocity.

    Problems and Examples

    • If an object's velocity is doubled, its momentum is quadrupled.
    • If a 30.00 kg mass falls from a height of 4.00 m, its momentum just before it hits the ground is 265.63 kg m/s.
    • The total momentum of two objects moving in opposite directions is the sum of their individual momenta.

    Other

    • Convection is the main process of heat transfer in an air-conditioning unit.
    • In headphones, electrical energy is converted into sound energy.
    • The angle of elevation of an object's velocity with the horizontal is 45° when its horizontal and vertical components are equal in magnitude.

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    Description

    Test your understanding of uniformly accelerated motion with this quiz. Answer questions about the velocity and acceleration of objects, including a ping pong ball and an airplane.

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