Momentum and Impulse Quiz
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Questions and Answers

What is the difference between impulse and impact force?

  • the time the force acts (correct)
  • the difference between acceleration and velocity
  • the mass and its effect on resisting a change in momentum
  • the distance the force acts

    • What would happen if a tiny gun made of a strong but very light material fires a bullet that is more massive than the gun itself?

  • the target would be safer than the shooter
  • recoil problems would be lessened
  • conservation of energy would not hold (correct)
  • conservation of momentum would not hold

    • What happens to the average force your body experiences if the time of impact is increased?

  • It increases
  • It stays the same
  • It decreases (correct)
  • It becomes impossible to determine

    • What does the force on an apple hitting the ground depend upon?

    <p>The time of impact with the ground</p> Signup and view all the answers

    What exerts the force that accelerates a rocket in outer space?

    <p>Exhaust gases</p> Signup and view all the answers

    If a large metal ball is shot from a cannon with a longer barrel, what happens to its muzzle velocity?

    <p>It increases</p> Signup and view all the answers

    After swallowing a 1-kg fish swimming toward it at 4 m/s, what is the speed of the 5-kg shark?

    <p>$\frac{1}{6}$ m/s</p> Signup and view all the answers

    What was the initial speed of the 5000-kg freight car before colliding with a 10,000-kg freight car at rest?

    <p>6 m/s</p> Signup and view all the answers

    Which of the following scenarios has the largest momentum relative to the Earth?

    <p>the Science building on campus</p> Signup and view all the answers

    What factor distinguishes impulse from impact force?

    <p>time the force acts</p> Signup and view all the answers

    When a tiny gun made of a strong but very light material fires a bullet more massive than the gun itself, what would not hold true?

    <p>conservation of energy</p> Signup and view all the answers

    When two objects of different masses but same size and shape are dropped from a tower, what is greater for the heavier one?

    <p>all of these</p> Signup and view all the answers

    What is the effect on the average force your body experiences if the time of impact is increased?

    <p>It is less than 1/10 as great</p> Signup and view all the answers

    What does the force on an apple hitting the ground depend upon?

    <p>All of these</p> Signup and view all the answers

    What exerts the force that accelerates a rocket in outer space?

    <p>Exhaust gases</p> Signup and view all the answers

    If a large metal ball is shot from a cannon with a longer barrel, what happens to its muzzle velocity?

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

    After swallowing a 1-kg fish swimming toward it at 4 m/s, what is the speed of the 5-kg shark?

    <p>$1/6$ m/s</p> Signup and view all the answers

    If you push for a half hour or a whole hour against a stationary wall, what happens in terms of work done?

    <p>No work is done in either case</p> Signup and view all the answers

    Study Notes

    Impulse and Impact Force

    • Impulse is the product of force and time, whereas impact force is the force exerted during a collision.
    • Impulse is a measure of the change in momentum, whereas impact force is a measure of the rate of change of momentum.

    Momentum and Collisions

    • When a tiny gun fires a bullet more massive than the gun itself, the gun will recoil backward with a speed greater than the bullet's speed.
    • Momentum is conserved in a collision, meaning the total momentum before the collision is equal to the total momentum after the collision.

    Force and Acceleration

    • The force on an apple hitting the ground depends on the mass of the apple and the acceleration due to gravity.
    • The force that accelerates a rocket in outer space is the thrust produced by the rocket's engines.

    Velocity and Muzzle Velocity

    • If a large metal ball is shot from a cannon with a longer barrel, its muzzle velocity will increase.
    • The speed of a 5-kg shark after swallowing a 1-kg fish swimming toward it at 4 m/s can be calculated using the law of conservation of momentum.

    Momentum and Kinematics

    • The initial speed of a 5000-kg freight car before colliding with a 10,000-kg freight car at rest can be calculated using the law of conservation of momentum.
    • The scenario with the largest momentum relative to the Earth would be the one with the largest product of mass and velocity.

    Force and Time

    • If the time of impact is increased, the average force experienced by the body decreases.
    • Pushing against a stationary wall for a longer time does not result in more work done, as the displacement is zero.

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    Description

    Test your knowledge about momentum and impulse with this quiz. Answer questions about momentum, impulse, and impact force.

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