Topic 9 - Motions In Fields

Question 1

Gravitational field strength

Answer 1

At a point is the force per unit mass on a small mass placed at the point

Question 2

Gravitational potential energy

Answer 2

At a point is the work done to move a mass from infinity to that point.

Question 3

Gravitational potential

Answer 3

At a point in a gravitational field is the work done per unit mass in moving a small mass from infinity to that that point.

Question 4

Kepler’s third law

Answer 4

The square of the period of revolution of a planet around the sun is proportional to the cube of the average distance of the planet from the sun.

Question 5

Electric potential difference

Answer 5

Between two points is the work done per unit charge to move a small positive charge between two points.

Question 6

Elective field strength

Answer 6

Is the force per unit charge felt by a positive test charge placed in the field

Question 7

Electric potential

Answer 7

At a point is the work done per unit charge in bringing a small positive charge from infinity to that point

Question 8

Newton’s law of universal gravitation

Answer 8

The force of gravity between two objects is proportional to the objects’ mass and inversely proportional to the square of the distance between them.