# Review Force and Motion-2

1. ### The cannon ball is smaller.

No. While smaller size means a little less air resistance, that is not enough to cause the difference.
2. ### The wheels on the cannon are stuck.

No. Even with the wheels moving freely, the cannon ball will still move much faster and much farther.
3. ### The cannon ball is round.

No. While the round shape means a little less air resistance, that is not enough to cause the difference.
4. ### The cannon ball weighs less.

Yes! According to Newton's Second Law of Motion, the more mass an object has, the less it will be affected by a force. Newton's Third Law of Motion tells us that the cannon and the cannon ball will both be pushed by the same amount of force, but since the cannon is much heavier (more mass), it will not move as fast or as far.

If the cannon was made of very light weight plastic, so that it was much ligher (less mass) than the cannon ball, then the cannon would move farther and faster.

### Florida

SC.5.P.13.3 Investigate and describe that the more mass an object has, the less effect a given force will have on the object's motion.
 Water in a Glass, part 3 video Water in a Glass, part 1 video Obedient Coin video Wrong Way Balloon video High Bounce video The Difference Between Weight and Mass video Water in a Glass, part 2 video Review Force and Motion-1 practice Review Force and Motion-2 practice

### Utah

UT.3.III.2.b Compare and chart the relative effects of a force of the same strength on objects of different weight (e.g., the breeze from a fan will move a piece of paper but may not move a piece of cardboard).
 Water in a Glass, part 3 video Water in a Glass, part 1 video High Bounce video Floating Cups video Water in a Glass, part 2 video Review Force and Motion-1 practice Review Force and Motion-2 practice

### NGSS

MS-PS2-2 Plan an investigation to provide evidence that the change in an object’s motion depends on the sum of the forces on the object and the mass of the object.
 Floating Cups video The Difference Between Weight and Mass video Torque video Water in a Glass, part 2 video Water in a Glass, part 3 video Water in a Glass, part 1 video Newton's First Law of Motion video, ClosedCaptions Obedient Coin video Wrong Way Balloon video Strange Flame, part 2 video Strange Flame, part 1 video Science Friction video Raw Egg or Boiled? video More Science of Balance video Science of Balance video The Old Tablecloth Trick video Smoke Rings video Bernoulli Effect video Balancing a Meter Stick text page Review Force and Motion-1 practice Review Force and Motion-2 practice Review Force and Motion-4 practice