# Physics

 ___________ is the rate at which distance is traveled speed ______ is speed with direction velocity _________speed is speed at any moment instantaneous _________ speed is the totale distance divided by total time for a trip average ___________ is the rate at which velocity changes acceleration a __________ has both magnitude and direction vector if you walk away from a motion detector, the distance-time graph slopes _______ up if you walk towards a motion detector, the distance-time graph slopes ________ down if you stand still, the distance-time graph is ________ flat if you walk towards the motion detector, the velocity is _________ negative if you walk away from the motion detector, the velocity is _________ positive if you stand still, the velocity is _______________ zero if you walk more quickly, the slope of the graph is _________ steeper the word __________ means size or amount magnitude if you are standing on a moving bus, you are at rest _______ to the bus, but moving ______ to the ground outside relative ___________ is measured in the unit m/s2 acceleration a ____________ has magnitude but no direction scalar ____________ is the stretching force in a string tension the sum of two vectors is called the _________ resultant an object moving in the air only affected by gravity is called a _____________ projectile a vector can be resolved into two _______________, horizontal and vertical components ______________ is the force between objects as they slide across each other friction __________ is an object's resistance to a change in its motion inertia an object's ________ changes as the object moves from the Earth to the moon weight an object's ______ doesnt change as it moves from the Earth to the moon mass __________ is the unit for force Newton __________ is the quantity of matter in an object, it is measured in kilograms mass _____ is the force of gravity on an object weight the combination of all forces acting on an object is called the _______________ net force A book sits on the table. The table pushes up on it. The name of this force is the __________ force normal __________________ is when the net force on an object is zero equilibrium if i push a box to the right, the direction of friction on it is to the ____________ left ___________ is the unit for pressure pascal Newton's third law says that when two objects collide, the forces on them are always ___________ equal A skydiver moves at a constant speed called the ___________ speed when her weight equals the force of air resistance on her terminal as a skydiver's speed increases, the force of air resistance on her _________________ increases ______________ is the amount of force per area pressure What does Newton's third law say? For every action, there is an equal and opposite reaction What does Newton's first law say? AN object at rest will stay at rest and an object in motion will stay in motion at a constant velocity unless acted on by an outside net force __________ causes a change in momentum impulse an objects ____________ depends on its mass and velocity momentum The law of ____________________________ says that the total momentum of two objects before a collision is the same as the total momentum after the collision conservation of momentum an ____________ collision occurs when two objects bounce elastic an _________________ collision occurs when two objects stick together inelastic an ________________ is when two objects start together and end separate explosion ________ is done when an object is moved by a force work ______________ is the unit at which work and energy are measured joules ________ is the rate at which work is done power one ________ equals one joule per second watt ______________ energy is stored energy potential if you lift an object, you give it ___________________ potential energy gravitational if an object is moving, it has ______ energy kinetic the law of ________________________________ states that energy can neither be created or destroyed conservation of energy If you hold an object above the ground, it has ___________________ energy. As it falls, it gains ___________ energy and loses _______ energy. The total amount of energy at any point in its fall is ____________. gravitational potential, kinetic, gravitational potential, constant A force that acts perpendicular to the motion of an object is called the _____________ force and it makes the object ______________________________________. centripetal, turn in a circular path The gravitational force between two objects depends on their ________________ and the ________ between their centers masses, distance Authorkkbrum ID129273 Card SetPhysics DescriptionPhysics 1 Mid-year Review Updated2012-01-21T01:11:42Z Show Answers