Transcript Slide 1
Physics Semester 1 Review Made by Julia, Lauren and Emily True or false: Accuracy is the extent to which a reported measurement approaches the true value of the quantity measured. True The degree of exactness or refinement of a measurement is called… Precision What is terminal velocity? When air resistance is so great that acceleration stops What is change in velocity? Acceleration True or false: X and Y forces cannot mix in any physics equation. True When drawing a diagram, where should the origin of the x and y axes be drawn? In the center of the object What is weight measured in? Newtons (N) True or false: One of Newton’s laws is called Law of Relations. False: Newton’s Laws are Law of Acceleration, Law of Inertia, and Law of Motion A push or a pull is called what? Force What is SOH CAH TOA used for? For finding angles and sides of right triangles What is the force that the ground exerts on your feet called? Normal Force True or False: vertical motion is dependent on forward motion False: Vertical and forward motion are both independent The force of friction increases when WHAT is added? Weight What is Newton’s Law of Inertia? Law of Inertia - an object at rest will stay at rest unless acted upon by an outside force How many sig figs are in 3.0133? Five True or false: The force of friction always points parallel to the surfaces in contact. True Do heavier objects fall more slowly than lighter objects? If there is no air resistance then heavier objects do NOT fall more slowly; they fall at equal rates. True or false: In order to effectively complete metric conversions, you should use dimensional analysis. True What is the difference between centripetal acceleration and centrifugal acceleration? Centripetal acceleration is the acceleration an object experiences as it travels a certain velocity along an arc. Centrifugal force is the imaginary force an unrestrained object experiences as it moves around an arc. What is change in position called? Displacement True of false: Static friction exists when you are sliding. False What is the difference between vectors and scalars? Vectors have magnitude and direction; scalars have only magnitude What is friction? a resisting/retarding force What unit is used to measurement acceleration (a) and centripetal acceleration (ac)? Meters per seconds 2 squared (m/s ) What is Newton’s Law of Interaction? for every action there is an equal and opposite reaction Will a 5 N box slide if it is being pushed with 10 N but pulled with 4 N? Yes because 10N>4N What are some vectors quantities? displacement, velocity, acceleration, Force What is the Law of Acceleration? the mass of an object determines its resistance to movement; the greater mass of an object impedes the overall rate of acceleration What unit is mass measured by? Kilograms (kg) Provide a synonym for The Force of Gravity Weight What are some scalars quantities? length, area, volume, speed, mass, density What is centripetal acceleration? acceleration towards the center; how quickly an object’s direction changes True or False: A heavy mass is hanging from a string. If the mass is at rest, it will tend to remain at rest. True How can you determine the radius if only a diameter is given? Divide the diameter in half. d=2r You push against the wall and it makes you move backwards. The force you pushed against the wall must be ______ to the force the wall reacted with equal What unit is angular speed (ω) measured by? Radians per second (rad/s) What is tangential velocity? The rate of change in displacement of an object moving in a circular path When an object is thrown upwards, when is its ascending speed equal to its descending speed? When it is at the same height How many sig figs are in 0.001? One What unit is angular displacement (theta) measured by? Radians (rad) Good Luck!