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Across
2.the bigger this is, the harder it is to accelerate it
4.this law is about maintaining the same speed
5.if the hammer hits the nail, then the nail hits the ...
8.don't do more than 50 of these per hour in the city
9.a moving object with no forces acting on it will have this sort of speed
12.if you push something and it doesn't move, then the forces on it are ...
14.this is measured in metres per second per second
15.you can't change direction without one of these
18.when calculating speed you must ............... distance by time
19.this sort of force always produces an acceleration
20.speed can be measured in kilometres per .....
21.the rate of change of distance
Down
1.a force that always opposes motion
3.if your speed is increasing you are .....
6.something that can be measured in "light years"
7.a force is an ....
10.he came up with the three laws of motion
11.this law emphasizes interactions
13.what you get together with an "action"
16.this law is about unbalanced forces
17.the standard scientific unit for distance

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