3 B LSI Physics - Exam Review Vectors and Universal Gravitation

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Questions and Answers

What is a vector in physics?

  • A quantity with no magnitude or direction
  • A quantity with magnitude only
  • A quantity with direction only
  • A quantity with both magnitude and direction (correct)

Which field illustrates the influence of an object or force on its surroundings?

  • Magnetic field
  • Electric field
  • Scalar field
  • Vector field (correct)

What does Kepler's 1st Law state?

  • Planets move in elliptical orbits with the sun at one focus (correct)
  • Planets move in hyperbolic orbits around the sun
  • Planets move in circular orbits around the sun
  • Planets move in straight lines away from the sun

What is gravitational potential energy?

<p>The potential energy of an object given its position in a gravitational field (A)</p> Signup and view all the answers

What does Kepler's 2nd Law, the Law of Equal Areas, state?

<p>The line between the Sun and a planet sweeps out the same area in an equal time period (A)</p> Signup and view all the answers

What is the gravitational field strength (g)?

<p>The gravitational force per unit mass at a point in the field (A)</p> Signup and view all the answers

What is eccentricity in the context of orbits?

<p>The shape of an orbit, determining how flattened it is (C)</p> Signup and view all the answers

What is Universal Gravitation?

<p>The law stating that any two objects attract each other with an equal force in opposite directions. (B)</p> Signup and view all the answers

What is Gravitational Potential (V)?

<p>The potential energy of an object given its position in a gravitational field. (C)</p> Signup and view all the answers

What is a vector in physics?

<p>Quantity with both magnitude and direction that can represent many different concepts in physics.</p> Signup and view all the answers

What is the gravitational field strength (g)?

<p>Gravitational force per unit mass that would be exerted on a small mass at a point in the field.</p> Signup and view all the answers

What is the significance of eccentricity in the context of orbits?

<p>Describes the distance between the two foci of an ellipse, determines how flattened the orbit is.</p> Signup and view all the answers

What does Kepler's 1st Law state?

<p>Planets move in an elliptical orbit with the sun at one focus.</p> Signup and view all the answers

What is the Universal Gravitation?

<p>Any two objects attract each other with an equal force in opposite directions.</p> Signup and view all the answers

What is Gravitational Potential Energy?

<p>The potential energy of an object given its position in a gravitational field.</p> Signup and view all the answers

What is the Gravitational Potential (V)?

<p>The GPE per unit mass; defined as the work that must be done to move an object from the reference point to that position.</p> Signup and view all the answers

What is the significance of Apocenter in orbits?

<p>Point furthest from the sun; minimum velocity of the object.</p> Signup and view all the answers

What is the significance of Pericenter in orbits?

<p>Point closest to the sun; maximum velocity of the object.</p> Signup and view all the answers

What is Kepler's 2nd Law, the Law of Equal Areas?

<p>The line between the Sun and a planet 'sweeps out' the same area in an equal time period.</p> Signup and view all the answers

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