Daub the work and energy board

Exercise and reference answers

Clues and terms

1. Clue

   SI unit of work, kinetic energy and potential energy alike, of dimensions ML2T-2

   Item

   Joule

2. Clue

   One joule of work delivered every second, named after an innovator of the steam engine

   Item

   Watt

3. Clue

   746 watts, a unit still quoted for the output of automobiles and motorbikes

   Item

   Horsepower

4. Clue

   What the electricity bill counts, and a unit of energy rather than of power

   Item

   Kilowatt hour

5. Clue

   The spring rule Fs = -kx, with the constant k measured in newton per metre

   Item

   Hooke's law

6. Clue

   Two vectors multiplied to give AB cos of the angle, ending in a plain number

   Item

   Scalar product

7. Clue

   Half the mass times the square of the speed, the work a moving body can do

   Item

   Kinetic energy

8. Clue

   Heavy water or graphite, chosen so a fast neutron gives up most of its energy

   Item

   Moderator

9. Clue

   Describes a force whose work around any closed path comes to zero

   Item

   Conservative

Instructions

Read each call and tap the term on the board that it names. Three in a row wins.

Explanation