Physics of Motion
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Questions and Answers

What is a common characteristic of all objects in the universe, including those that appear to be stationary?

  • They have a constant velocity
  • They are at rest with respect to the Earth
  • They are stationary with respect to the Milky Way
  • They are moving with the Earth's rotation (correct)

    • What is the term used to describe the classification and comparison of motions?

  • Dynamics
  • Kinematics (correct)
  • Mechanics
  • Statics

    • What is the meaning of the terms 'moment' and 'instant' in the context of motion?

  • A rate of change
  • A particular point of time (correct)
  • A length of time
  • A type of force

    • What can be said about the motion of two passengers sitting in a moving car?

    <p>They are at rest with respect to each other</p> Signup and view all the answers

    What is the condition required for an object to be considered moving?

    <p>The object must be changing its position with respect to time</p> Signup and view all the answers

    What is the implication of the fact that motion is relative?

    <p>An object can be at rest with respect to one reference but moving with respect to another</p> Signup and view all the answers

    What is the characteristic of a freely falling body's motion?

    <p>Non-uniform motion</p> Signup and view all the answers

    What is the SI unit of speed?

    <p>Meter per second</p> Signup and view all the answers

    What is the formula to calculate the speed of an object?

    <p>v = s/t</p> Signup and view all the answers

    What is the nature of speed?

    <p>Scalar quantity</p> Signup and view all the answers

    Why is it difficult to maintain constant speed in a car?

    <p>Due to traffic and red lights</p> Signup and view all the answers

    What is the average speed of an object equal to?

    <p>Total distance traveled divided by total time</p> Signup and view all the answers

    What is the definition of velocity?

    <p>Rate of change of displacement</p> Signup and view all the answers

    What is the SI unit of velocity?

    <p>Metre per second</p> Signup and view all the answers

    What is the characteristic of a body with uniform velocity?

    <p>It travels in a straight line with equal distances in equal intervals of time</p> Signup and view all the answers

    What is the effect on the velocity of a car moving on a circular road with constant speed?

    <p>The velocity changes direction but not speed</p> Signup and view all the answers

    What are the three ways to change the velocity of a body?

    <p>Changing the speed, changing the direction, and changing the speed and direction</p> Signup and view all the answers

    What is the formula to find the average velocity of a body?

    <p>(v1t1 + v2t2) / (t1 + t2)</p> Signup and view all the answers

    What can be said about an object that has varying velocity?

    <p>It may have varying speed.</p> Signup and view all the answers

    What is the acceleration of the car in the first case?

    <p>0.2 m/s^2</p> Signup and view all the answers

    Is it possible for an object to have non-zero velocity for a time interval while having zero acceleration at any instant within that interval?

    <p>Yes, it is possible.</p> Signup and view all the answers

    What is the acceleration of the car in the second case?

    <p>-0.4 m/s^2</p> Signup and view all the answers

    Under what condition can an object have non-zero acceleration without having varying velocity?

    <p>When the object is changing direction.</p> Signup and view all the answers

    Which of the following statements is true about an object's velocity and acceleration?

    <p>An object's velocity and acceleration can be in the same or opposite directions.</p> Signup and view all the answers

    What is the displacement of the minute hand of a clock in one hour?

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

    What is the average velocity of an object moving with a uniform velocity v1 for a distance x and then with a uniform velocity v2 for the same distance?

    <p>(v1 + v2) / 2</p> Signup and view all the answers

    When is the magnitude of the average velocity of an object equal to its average speed?

    <p>When the object is moving in a straight line</p> Signup and view all the answers

    What is the rate of change of velocity with respect to time called?

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

    What type of motion is characterized by a decreasing or increasing speed, or a changing direction of motion?

    <p>Non-uniform motion</p> Signup and view all the answers

    What is the initial velocity of the bus in the given scenario?

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

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