Motion
39 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the definition of energy in physics?

  • The capacity to cause change in an object (correct)
  • The ability to perform work on an object
  • The ability to increase the mass of an object
  • The ability to transfer heat to an object

What is the law of conservation of energy?

  • The total energy of an isolated system cannot change (correct)
  • Energy can be created and destroyed
  • Energy can be transferred but not changed
  • Energy can only be changed but not transferred

What is the equation that expresses the first law of thermodynamics for a closed system?

  • E1 + E2 = Q – W
  • E2 - E1 = Q + W
  • E2 - E1 = Q – W (correct)
  • E1 + E2 = Q + W

What is the internal energy (E) equal to?

<p>The difference of the heat transfer and the work done (A)</p> Signup and view all the answers

What is the physical property that must be transferred to an object to perform work on it?

<p>Energy (A)</p> Signup and view all the answers

What is the characteristic of energy that makes it a conserved quantity?

<p>It can change form but not amount (C)</p> Signup and view all the answers

What is displacement in linear motion?

<p>The vector difference between the ending and starting positions of an object. (B)</p> Signup and view all the answers

What is the formula for average velocity?

<p>Vav = ∆x / ∆t (C)</p> Signup and view all the answers

What is the instantaneous velocity of an object?

<p>The velocity of an object at a specific point in time. (C)</p> Signup and view all the answers

What is the difference between average velocity and average speed?

<p>Average velocity is a vector, while average speed is a scalar. (B)</p> Signup and view all the answers

What is the unit of average velocity?

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

What is the name of the type of motion a pendulum exhibits when released?

<p>Simple harmonic motion (A)</p> Signup and view all the answers

What is the period of a pendulum dependent on?

<p>Both the length of the pendulum and the amplitude of the pendulum's swing (D)</p> Signup and view all the answers

What is the frequency of a pendulum related to?

<p>The number of times the pendulum swings back and forth per second (D)</p> Signup and view all the answers

What is the equation that relates the period of a pendulum to its length and gravitational acceleration?

<p>T = 2π√(l/g) (D)</p> Signup and view all the answers

What is the purpose of a centrifuge in a laboratory?

<p>To separate fluids, gas, or liquid based on density (A)</p> Signup and view all the answers

What is the principle behind the operation of a centrifuge?

<p>Sedimentation principle (D)</p> Signup and view all the answers

What happens to objects that are less dense in a centrifuge?

<p>They move to the center of the tube (B)</p> Signup and view all the answers

What is the force that retards a sphere moving through a viscous fluid proportional to?

<p>The velocity of the sphere, the radius of the sphere, and the viscosity of the fluid (B)</p> Signup and view all the answers

What are the units of Fd in Stokes' law?

<p>N (B)</p> Signup and view all the answers

What is the role of the buoyant force in Stokes' law?

<p>It is in equilibrium with the difference between the download gravitational force and upward buoyant force (C)</p> Signup and view all the answers

What is the symbol for the viscosity of the fluid in Stokes' law?

<p>η (A)</p> Signup and view all the answers

What is the direction of the frictional force (Fd) acting on the interface between the fluid and the particle?

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

What is the direction of the buoyant force relative to the external force?

<p>Parallel to the external force but in the opposite direction (B)</p> Signup and view all the answers

What is the purpose of a centrifuge in relation to gravity?

<p>To increase the acceleration due to gravity (D)</p> Signup and view all the answers

What is the retarding force acting on a particle moving in a fluid due to?

<p>Frictional resistance (D)</p> Signup and view all the answers

What are the three forces that act on a rigid particle moving in a fluid?

<p>External force, buoyant force, and drag force (A)</p> Signup and view all the answers

What is the drag force exerted by a fluid on a solid?

<p>A force in the direction of the fluid flow (A)</p> Signup and view all the answers

What do Newton's laws of motion describe?

<p>The relationship between a body and the forces acting upon it (A)</p> Signup and view all the answers

The unit of force is Kg.m/s²

<p>True (A)</p> Signup and view all the answers

Momentum is a scalar quantity

<p>False (B)</p> Signup and view all the answers

Impulse is equal to the change in momentum

<p>True (A)</p> Signup and view all the answers

The gravitational force between two objects is inversely proportional to the square of the distance between them

<p>True (A)</p> Signup and view all the answers

A net force of 0 Newtons acting on an object means it is accelerating

<p>False (B)</p> Signup and view all the answers

The weight of an object is the same as its mass

<p>False (B)</p> Signup and view all the answers

The acceleration of an object is directly proportional to the net force acting on it

<p>True (A)</p> Signup and view all the answers

The unit of momentum is Kg.m/s

<p>True (A)</p> Signup and view all the answers

The force of gravity is a contact force

<p>False (B)</p> Signup and view all the answers

The mass of an object is 1 kg, its weight is also 1 N

<p>True (A)</p> Signup and view all the answers

More Like This

Use Quizgecko on...
Browser
Open
Browser
Browser