Physics Concepts and Applications Quiz
24 Questions
0 Views

Physics Concepts and Applications Quiz

Created by
@GracefulPascal

Podcast Beta

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the distance the cheetah moves in the process of accelerating to 26 m/s in 3 seconds?

  • 30
  • 45
  • 39 (correct)
  • 32

    • Which of the following statements describes a situation with negative acceleration?

  • An object is moving at increasing heights.
  • An object is at constant velocity.
  • An object is slowing down while moving downwards. (correct)
  • An object is speeding up while moving upwards.

    • To find the spring constant k of a spring that stretches from 10.0 cm to 13.4 cm with a 4.0 kg weight, what formula is used?

  • $k = m \cdot a$.
  • $k = \frac{m}{g}$, where m is mass and g is gravitational acceleration.
  • $k = \frac{v}{t}$.
  • $k = \frac{F}{x}$, where F is the force and x is the extension. (correct)

    • What can be deduced about a 1 kg ball acted upon by a 40 N upward tension and its weight?

    <p>It is accelerating upwards.</p> Signup and view all the answers

    If a fish jumps out of water at 2.5 m/s at a 45° angle, what does this imply about its initial horizontal and vertical velocity components?

    <p>Both horizontal and vertical components are equal.</p> Signup and view all the answers

    What is the maximum possible distance (in meters) that the fish can travel at point B when jumping with a velocity of 2.5 m/s?

    <p>0.64</p> Signup and view all the answers

    How would you calculate the net force acting on an object experiencing three forces in the same plane?

    <p>Sum the individual forces vectorially.</p> Signup and view all the answers

    When a fish is suspended from a spring scale and stretches it to 13.4 cm, what does this indicate about the force exerted on the spring?

    <p>It equals the weight of the fish.</p> Signup and view all the answers

    What is the difference in tension between T1 and T2 if T1 is 9.1 N and T2 is 8.6 N?

    <p>9.1 N</p> Signup and view all the answers

    If an object weighs 100 N on Earth, what will its weight be on a planet with twice the mass and radius of Earth?

    <p>50 N</p> Signup and view all the answers

    What is the tension in each cable supporting a 10.0 kg box at an angle with the ceiling, where each cable length is 1.50 m and the box is 1.00 m below the ceiling?

    <p>92.7 N</p> Signup and view all the answers

    In viscous-force-dominated motion, how is velocity expressed as a function of time?

    <p>$v = v_0 e^{-t/\tau}$</p> Signup and view all the answers

    What is the formula to calculate drag force due to viscous force for a spherical object?

    <p>$D = 6\pi \eta r v$</p> Signup and view all the answers

    What happens to the acceleration of an object if it experiences exponentially decreasing acceleration over time?

    <p>Acceleration approaches zero.</p> Signup and view all the answers

    Which of the following correctly defines the Reynolds number?

    <p>$Re = \frac{\rho v D}{\mu}$</p> Signup and view all the answers

    When dealing with horizontal motion, what does 's' represent?

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

    What is the magnitude of the acceleration of a skier slowing from 8.0 m/s to 6.0 m/s over a distance of 5.0 m?

    <p>2.8 m/s²</p> Signup and view all the answers

    During takeoff, what is the apparent weight of a 70-kg astronaut experiencing an upward acceleration of 5.4 m/s² on a planet with a free-fall acceleration of 16.6 m/s²?

    <p>1540 N</p> Signup and view all the answers

    How far will a car skid to a halt if it has a mass of 1350 kg traveling at 43 m/s on wet concrete with a coefficient of kinetic friction of 0.37?

    <p>255 m</p> Signup and view all the answers

    What incorrect statement can be made right after a skydiver opens her parachute during free fall?

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

    If a car with a mass of 1500 kg is towed by a rope at a 20-degree angle with a friction force of 320 N opposing its motion, how much tension is created in the rope when the car accelerates to 12 m/s in 10 s?

    <p>2710 N</p> Signup and view all the answers

    Which factor does NOT affect the magnitude of the drag force experienced by a skydiver when they open their parachute?

    <p>The mass of the skydiver</p> Signup and view all the answers

    What would be the top speed of a horse after starting to run if its acceleration decreases exponentially with a time constant of 4.2 s?

    <p>24 m/s</p> Signup and view all the answers

    What is the unit of the coefficient of kinetic friction, and which of the following has the correct value for a standard wet concrete surface?

    <p>Dimensionless; 0.37</p> Signup and view all the answers

    Study Notes

    Physics Concepts and Applications

    • Net Force: The magnitude of the net force acting on an object is the sum of all forces acting on it.
    • Acceleration: Negative acceleration occurs when an object slows down.
    • Projectile Motion: The distance traveled by a projectile launched at an angle depends on its initial speed and launch angle.
    • Springs: The spring constant k is a measure of a spring's stiffness, indicating the force required to stretch or compress it by a unit length.
    • Newton's Second Law: The net force acting on an object is equal to the product of its mass and acceleration: F = ma.
    • Weight vs. Apparent Weight: Weight is the force due to gravity, while apparent weight is the force experienced by an object supported against gravity.
    • Friction: Friction is a force opposing motion between two surfaces in contact. Kinetic friction acts on objects in motion.
    • Terminal Velocity: Terminal velocity is the constant speed that a freely falling object eventually reaches when the force of air resistance balances its weight.
    • Work-Energy Theorem: The work done on an object is equal to its change in kinetic energy: W = ΔKE
    • Tension: Tension is the force exerted by a stretched rope or cable.
    • Newton's Laws of Motion: The motion of the blocks hanging one under the other is described by Newton's second law, considering the forces acting on each block.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Related Documents

    Phys 2A Midterm Exam 2024 Spring PDF

    Description

    Test your understanding of key physics concepts including net force, acceleration, and projectile motion. This quiz covers essential topics such as Newton's Second Law and the effects of friction. Perfect for students looking to reinforce their physics knowledge!

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser