Physics Projectile Motion and Momentum Quiz
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Questions and Answers

What is the velocity of an object at its highest point during an upward throw?

  • 0 m/s (correct)
  • It varies with time
  • 10 m/s
  • 10 m/s upwards
  • What is the acceleration of an object while it is thrown upwards?

  • 9.81 m/s² upwards
  • 0 m/s²
  • 9.81 m/s² downwards (correct)
  • Acceleration decreases to zero
  • In a free fall situation, how does the velocity of an object change as it falls towards the ground?

  • It varies randomly
  • It decreases to zero
  • It remains constant
  • It increases (correct)
  • What is the vertical acceleration of a projectile?

    <p>9.81 m/s² downwards</p> Signup and view all the answers

    When comparing two objects thrown horizontally from the same height, which lands first?

    <p>Both land at the same time</p> Signup and view all the answers

    What happens to the displacement of an object when it is dropped from a certain height?

    <p>It is equal to the height of the drop</p> Signup and view all the answers

    What can cause an object to be classified as a projectile?

    <p>An object that is acted upon only by gravity</p> Signup and view all the answers

    During a snail's acceleration, what affects its final velocity?

    <p>Initial speed and time of acceleration</p> Signup and view all the answers

    What happens to the momentum of an object if its mass is increased while its velocity remains constant?

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

    Which of the following statements about momentum is true?

    <p>Momentum is the product of mass and velocity</p> Signup and view all the answers

    What is the primary effect of increasing the time of impact in a collision?

    <p>Decreased force experienced</p> Signup and view all the answers

    For the 2500 kg truck to have the same momentum as a 100 kg tricycle, what speed must the tricycle have?

    <p>375 m/s</p> Signup and view all the answers

    When is impulse defined as the change in momentum?

    <p>Over a period of time</p> Signup and view all the answers

    What happens to the impulse experienced by an object if a small force is applied for a long duration?

    <p>Impulse can exceed that of a larger force</p> Signup and view all the answers

    What is the velocity of a 1200 kg car that has a momentum of +17,000 kg⋅m/s?

    <p>14.17 m/s</p> Signup and view all the answers

    In a collision, why does an egg remain whole when it hits a sheet but breaks when it hits a wall?

    <p>The time of impact is longer on the sheet</p> Signup and view all the answers

    What factor allows the driver using an airbag to experience less injury than the passenger who hits the dashboard?

    <p>The airbag reduces the collision time</p> Signup and view all the answers

    Which statement correctly describes the relationship between mass and momentum?

    <p>Momentum increases with increasing mass for constant velocity</p> Signup and view all the answers

    Can box A experience a larger impulse than box B even if it has a lower applied force?

    <p>Yes, if the force is applied for a longer time.</p> Signup and view all the answers

    What is the impulse provided to a 0.4 kg American football kicked to a velocity of 5.5 m/s?

    <p>2.2 kg m/s</p> Signup and view all the answers

    What's the average force acting on a puck if it changes its velocity from 6.4 m/s to -3.6 m/s over 0.05 seconds?

    <p>100 N</p> Signup and view all the answers

    What type of collision occurs when a tennis ball bounces off a tennis racket?

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

    Why does a person on rollerblades recoil backward after throwing a heavy rock forward?

    <p>To conserve momentum.</p> Signup and view all the answers

    If a 0.25 kg baseball collides with a stationary catcher, what happens to its velocity after the collision?

    <p>It decreases.</p> Signup and view all the answers

    What is the change in momentum of a puck with an initial velocity of 6.4 m/s and a final velocity of -3.6 m/s?

    <p>5 kg m/s</p> Signup and view all the answers

    What is the outcome of two people colliding in an inelastic collision where Person A has 100 kg and moves at +4 m/s while Person B has 75 kg and moves at -4 m/s?

    <p>They move together at a velocity of +0.57 m/s.</p> Signup and view all the answers

    How does the speed of the rollerblader compare to the speed of the thrown rock?

    <p>Less than</p> Signup and view all the answers

    Which object has more inertia?

    <p>An elephant</p> Signup and view all the answers

    What happens to the beach ball in the back of a pickup truck when it accelerates forward?

    <p>It rolls to the back of the truck</p> Signup and view all the answers

    What MUST be present if there is acceleration?

    <p>Net force</p> Signup and view all the answers

    What is the direction of the force of friction?

    <p>Opposite to the direction of motion</p> Signup and view all the answers

    If a 1000 kg car stops due to a frictional force with a coefficient of 0.35, which is true about the frictional force acting on the car?

    <p>It can be calculated using the coefficient of friction</p> Signup and view all the answers

    What would be the net force on a 15 kg crate moving at a constant velocity when pushed with a force of 25 N?

    <p>0 N</p> Signup and view all the answers

    In a situation where a box is pulled with a force at an angle, how does the angle affect the vertical component of the force?

    <p>Decreases the vertical component</p> Signup and view all the answers

    What is the acceleration of two connected masses ($m_1$ = 8.5 kg and $m_2$ = 2.4 kg) through a pulley system?

    <p>Equal for both masses</p> Signup and view all the answers

    For an object dropped from a cliff, what is true about its initial velocity?

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

    What is the slope of a position vs. time graph representative of?

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

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