Presentation on theme: "3rd Law Questions Action and reaction forces comprise the parts of"— Presentation transcript:
1 3rd Law Questions Action and reaction forces comprise the parts of A single interactionTwo interactions
2 3rd Law QuestionsA player catches a ball. Consider the action force to be the impact of the ball against the player’s glove. The reaction to this force is theplayer’s grip on the gloveForce the glove exerts on the ballFriction of the ground against the player’s shoesMuscular effort in the player’s armsNone of these
3 3rd Law QuestionsEarth pulls on the moon. Similarly the moon pulls on the Earth, evidence that theEarth and moon are simply pulling on each other.Earth’s and moon’s pulls comprise an action-reaction pair.Both of theseNeither of these.
4 3rd Law Questions4. A player hits a ball with a bat. The action force is the impact of the bat against the ball. The reaction to this force is theAir resistance on the ballWeight of the ballForce of the ball against the batGrip of the player’s hand against the ballNone of these
5 3rd Law Questions5. A baseball player bats a ball with a force of 1000 N. The ball exerts a reaction force against the bat ofLess than 1000 NMore than 1000 N1000 N
6 3rd Law Questions6. A person is attracted toward the center of the Earth by a 500-N gravitational force. The force of attraction of the Earth toward the person isvery, very smallVery, very large500 N
7 3rd Law Questions7. The attraction of a person’s body toward the Earth is called weight. The reaction to this force isThe person’s body pushing against the Earth’s surfaceEarth’s surface pushing against the person’s bodyThe person’s body pulling on the EarthNone of these
8 3rd Law Questions8. The force exerted on the tires of a car to directly accelerate it along a road is exerted by theEngineTiresAirRoadNone of these
9 3rd Law Questions9. A horse exerts 500 N of force on a heavy wagon. The wagon pulls back on the horse with an equal force. The wagon still accelerates becauseThese forces are not an action-reaction pairNevertheless there is still an unbalanced force on the wagonThe horse pulls on the wagon a brief time before the wagon reactsUnlike the horse, it is not alive
10 3rd Law Questions10. A karate chop delivers a blow of 3000 N to a board that breaks. The force that acts on the hand during this event is actuallyLess than 3000 N3000 NMore than 3000 NThere is really no way to say for sure
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