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34 Cards in this Set
- Front
- Back
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A force is a push or pull that changes state of________ in an object
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Motion
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A force interaction requires at least how many forces?
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Two
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When one object exerts a force on another object, the second object exerts a force that is____ in direction, occurs at the_______ time and is_____ in magnitude?
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Opposite, same, equal,
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The force that directly propels a fish through the water is provided by the?
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Water
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The force that propels cars on a highway is provided by the
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Road
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A heavy ball at rest has a net force of?
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Zero
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If you push your book across the table, friction acts?
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Opposite you
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A boulder falls due to gravity, the reaction to the force on the boulder is the_______ pulling on the______=
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Boulder, earth
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A system goes under acceleration only when acted on by an?
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Outside force
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If a foot kicks the soccer ball the reaction is an equal force on the?
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Foot
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The ground that moves us forward as you walk is the horizontal force of the_____ on your feet, the______ to the force of your feet pushing back on the ground, and the____ force of the ground on your two feet
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Ground, reaction, friction
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When two objects are pushed away from each other by a spring in between them, the objects move away from each other with opposite accelerations that are?
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Equal
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If a lemming jumped off a cliff the earth would pull it downward, the reaction to this force is the_____ pulling back on the_______
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Lemming, earth
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If an axe hits a tree with 4000 Newtons the force that acts on the axe during this event is?
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4000 Newtons
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When a balloon is released and the air is flying out of it, the balloon shoots through the air. the force that propeled the balloon is provided by what?
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Ejected air
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The force that propels a rocket forward is provided by what?
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Exhaust gas
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When a ball is thrown forward, both the ball and pitcher experience what?
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The same force
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A flying Cow has a collision with the windshield of a truck, the force of impact on the cow is what compared to the impact on the truck
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The same
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A flying Cow has a collision with the windshield of a truck, the acceleration of the cow is what compared to deceleration of the truck?
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Higher than
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A car and a yacht with wheels collide on the highway, which is hit with a greater force?
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Neither
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A car and a yacht with wheels collide on the highway, which experiences the least amount of acceleration?
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The yacht mobile
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Why can't Natalie punch a piece of paper with much force?
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The paper can't produce enough opposite force
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The force that accelerates the horse and cart in the comic strip is what?
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Ground friction
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The team that wins the tug of war game is the team that does what?
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Pushes hardest on the ground
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How hard a boxer's punch lands depends on what?
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How much mass the object he hits has
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When you push against a wall you feel a pushing on your hand because?
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The wall pushes back with equal force
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When you toss a rock straight upward what is zero at the top of its path ?
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Velocity
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What a rock is yanked up by a string the upward force on the string compared to the weight of the rock is what?
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Greater
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When a force is exerted by hammer on a nail how much force is exerted by the nail on the hammer
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The same amount
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A bee can't fly in a vacuum because of what
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There is no air for the Bee to push down on
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When a helicopter is flying in the air, it gets its lift by the_______ of its blades pushing downward
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Reaction
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If two objects are pushed away from each other by spring and the objects have unequal masses, they accelerate from each other with what?
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different accelerations
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Whenever a_______is exerted on something that something accelerates
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Net force
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Have a skateboarder pushes on a wall with 30 Newton's, the wall will exert a ______ force______ on the skateboarder
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30N,back
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