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Transcript
Weight is expressed in A push or a pull Force exerted when only when objects touch Moving object’s Speed and direction Combination of all forces acting on an object Net force of zero is considered a What changes when unbalanced forces act on an object? Formula for speed How is constant speed represented on a distance-time graph? Forces that cause an object to change its motion Change in velocity of an object over time Force of attraction among all objects Gravitational force exerted on an object Air resistance is an example of which type of friction? 55 N to the right and 70 N to the left have a net force of Roller skating is an example of which type of friction? What is the direction and net force on a box 10 N down, 5 N --->, and 5 N <--- What is the direction and net force on a box 15 N up, 15 N down, 20 N -->, and 55 N <-- Opposes the motion of objects sliding past each other Formula for acceleration A car is turning while moving at a constant speed. Are the forces acting on the car balanced or unbalanced? A car accelerates from 30 mph to 40 mph in 5 seconds What is the acceleration? Prevents objects from sliding past each other If the distance between objects increases the gravitational force Three people push a piano on wheels with forces of 110 N -->, 100 N <--, and 95 N --> What do lubricants do? The force from a rubber band on your finger is an example of If the mass of an object decreases the gravitational force How fast an object’s position changes over time Microscopic dips and bumps cause ______ between surfaces Weight is expressed in A push or a pull Force exerted when only when objects touch Moving object’s Speed and direction Combination of all forces acting on an object Newtons force Contact force Velocity Net force How is constant speed represented on a distance-time graph? Forces that cause an object to change its motion Straight line Unbalanced forces Gravitational force exerted on an object Air resistance is an example of which type of friction? 55 N to the right and 70 N to the left have a net force of weight Fluid friction 15 N to the left What is the direction and net force on a box 15 N up, 15 N down, 20 N -->, and 55 N <-- Opposes the motion of objects sliding past each other Formula for acceleration Net force of zero is considered a What changes when unbalanced forces act on an object? Formula for speed Balanced force motion Distance/time Change in velocity of an object over time Force of attraction among all objects Acceleration gravity Roller skating is an example of which type of friction? What is the direction and net force on a box 10 N down, 5 N --->, and 5 N <--- Rolling friction 10N down 35 N to the left Sliding friction A car is turning while moving at a constant speed. Are the forces acting on the car balanced or unbalanced? A car accelerates from 30 mph to 40 mph in 5 seconds What is the acceleration? Prevents objects from sliding past each other If the distance between objects increases the gravitational force 2 mph/s Static friction decreases unbalanced What do lubricants do? Change in velocity over time Three people push a piano on wheels with forces of 110 N -->, 100 N <--, and 95 N --> 105 N --> The force from a rubber band on your finger is an example of Decrease friction Elastic force If the mass of an object decreases the gravitational force How fast an object’s position changes over time Microscopic dips and bumps cause ______ between surfaces decreases speed friction