micahs forces
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what happened when two forces act in the same direction
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They form a front that separates
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the greater the mass of an object
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The greater the inertia
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the force of gravity on a person or object on the surface of a planet is called
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Weight
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gravity will pull a pencil down with the same force as a feather with the same mass. This is an example of
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newtons second law
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if you drop a sheet of paper horizontal to the floor and a crumpled ball of paper at the same time from the same height in your classroom, the crumpled ball of paper will hit the floor first because
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air friction has greater effect on the non cumrbled pice of paper.
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an object that orbits another object in space is called a blank
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satilite
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the overall force on an object after all the forces are added together is called the blank force
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net
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the force of gravity between you and Earth is greater than the force of gravity between you and a car because Earth has more blank than the car
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mass
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when the only force acting on a falling object is air resistance, the object is said to be in free fall.
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false gravtey
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the property of matter that resists a change in motion is called inerta.
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true
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To calculate the density of an object, you multiply mass by volume.
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mulitply
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Friction depends on the types of surfaces involved and how hard the surfaces push together
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false divide
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The theory of gravity describes the attraction between all objects in the universe
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false law
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compare the acceleration of the 1-kg object with that of the 2-kg object
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the acceleration of the 1kg object is twice the acceleration of the 2kg object.
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in what direction must a force be applied so that the forces on the 1-kg object are balanced
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to the right
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in Set , explain the difference in the magnitudes of the gravitational forces between the two pairs of objects.
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action and reaction forces act on diffrent objects
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can you identify a pair of balanced forces in the diagram Explain your answer
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in set c pair the force equals are equal
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in Set A, what would you have to do to the objects to make the gravitational forces between the objects in pair 2 the same as the forces between the objects in pair 1
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the gravtional force between the objects in pair two is greater than the gravtioal force between the objects in pair 1 because the objects in pair 2 are closer two each other
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according to Newton's third law of motion, when a hammer strikes and exerts force on a nail, the nail blank
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exerts an equal and opposite force on the hammer
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forces can be added together only if they are blank
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acting on the same object
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how can you increase the momentum of an object
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by increasing its mass
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when placed in a bowl of oil with a density of 0.95 gcm3, an unknown material with a density of 0.90 gcm3 will blank
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float
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what happens when two forces act in the same direction
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their strenghts are added
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the force that one surface exerts on another when the two rub against each other is called blank
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friction
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the greater the mass of an object blank
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the greater its intria
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gravity will pull a pencil down with the same force as a feather with the same mass. This is an example of blank
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newtons second law of motion
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the force of gravity is responsible for continuously changing the blank in which a satellite moves.
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direction
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according to Newton's third law of motion, the strength of a reaction force is blank the strength of the action force.
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equal to
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the force of gravity between you and Earth is greater than the force of gravity between you and a car because Earth has more blank than the car
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Mass
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The greater the mass of an object
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the greater its inertia.
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The force that one surface exerts on another when the two rub against each other is called
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friction
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According to the law of conservation of momentum, when two objects collide in the absence of outside forces
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the objects have the same momentum before and after they collide.
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In physical science, a push or a pull is called a
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force
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The amount of matter in an object is called its
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mass
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The force that pulls falling objects toward Earth is called
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gravity
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The product of an object's mass and velocity is called its
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momentum
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How can you increase the momentum of an object
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by increasing its mass
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The total momentum of a group of objects is conserved unless
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outside forces act on the objects.
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One blank is the force required to accelerate 1 kilogram of mass at 1 meter per second per second.
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NEWTON
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According to Newton's third law of motion, the strength of a reaction force is blank the strength of the action force.
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EQUAL TO
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Friction acts in a direction blank to an object's direction of motion.
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OPPOSITE
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As the distance between two objects decreases, the gravitational force between them blank.
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INCREASE
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A person traveling in a car that stops suddenly keeps moving forward due to blank.
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INERTIA
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If the action force of a bat striking a ball accelerates the ball in one direction, the reaction force accelerates the bat in the blank direction.
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OPPOSITE
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The momentum of a roller skater is not conserved because acts on the skates.
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FRICTION
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Because the moon travels around Earth, it is a(n) blank.
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satellite
