Solve these clues to fill the grid.
- The mechanical ___ that a body has by virtue of its motion
- 5 Across
- Italian astronomer and mathematician who was the first to use a telescope to study the stars
- 8 Across
- A unit of power equal to 746 watts
- 10 Across
- A purging medicine (plural)
- 11 Across
- The use of movements to communicate familiar or prearranged signals
- 14 Across
- How fast something moves
- 15 Across
- Forces that provide energy and direction (plural)
- 16 Across
- A line or route along which something travels or moves
- 1 Down
- To cause to move back by force or influence
- 2 Down
- An increase in rate of change
- 3 Down
- The basic unit of length adopted under the Systeme International d'Unites (plural)
- 4 Down
- Distance travelled per unit time
- 6 Down
- A material's opposition to the flow of electric current
- 7 Down
- Hopeful and optimistic; the opposite of negative
- 9 Down
- Energy that makes things warm
- 12 Down
- A unit of ___ equal to the ___ exerted by gravity
- 13 Down