AP Physics 1 Exam Questions and Correct Answers Latest Update 2024 Already Passed

AP Physics 1 Exam Questions and Correct Answers Latest Update 2024 Already Passed What two entities comprise a vector? - Answers Magnitude and direction What do you do with any vector that is not on either the x or y axis? - Answers Break it up into x and y components using trig, add up the components. How are velocity and speed different? - Answers Velocity has a direction and speed does not have direction. What quantity is calculated from slope of the displacement versus time graph? - Answers velocity What does upward slope on a displacement versus time graph imply about the velocity. - Answers The velocity is positive What is acceleration? - Answers How quickly you change velocity. What is the area under the velocity time graph? - Answers Displacement What is the y intercept of the velocity time graph? - Answers The initial velocity, (Vo in the formulas) What is the area under the acceleration versus time graph? - Answers The CHANGE in velocity. What is the horizontal acceleration of projectiles? - Answers ZERO What direction controls time in falling body and projectile motion problems? - Answers Vertical direction What do you know about two objects that are launched at different horizontal velocities? - Answers They fall, vertically, the by the same amount in the same time. What equation describes the distance that a dropped object falls "t" seconds after it started moving? - Answers x=(1/2)at^2 Remember, the word "dropped" implies no initial velocity. What equation describes the distance that a horizontally launched projectile falls t seconds after it started moving? - Answers x=(1/2)at^2 ...Horizontal velocity does not affect the time of fall. What equation describes the speed of a dropped object "t" seconds after it started moving? - Answers V=Vo + at ...The word "dropped" means no initial velocity. What equation describes the speed in the x-direction of a projectile "t" seconds after it started moving? - Answers Vx=(Vxo)t ...Recall that there is no acceleration in the horizontal direction. What equation describes the speed in the y-direction of a projectile "t" seconds after it started moving? - Answers Vy=Vyo + gt ...Watch the signs. What is implied when an object is not accelerating in the x direction? - Answers The body is moving at a constant velocity What is implied when an object is not accelerating in the y direction? - Answers g=zero so h=(Vyo)t When is sum of force (net force) zero. - Answers When a body is moving at a constant velocity or not moving at all. When is sum of force (net force) NOT zero. - Answers When a body's speed is changing. What force is always present, and what is its equation? - Answers Weight ...w=mg How is sum of force (net force) depicted in a free body diagram? - Answers It is an arrow that DOES NOT touch the body. Recall that the net force is the answer when all the forces are added up. When is a normal force present, what is its direction? - Answers When the body rests on a surface. What is the component of "mg" parallel to a slope? - Answers (mg)sin(angle) What is the general equation for motion down a slope and how does it change if the object is going up the slope? - Answers x=Vo + ((1/2)g)sin(angle)t^2 In uniform circular motion, how is tangential velocity calculated? - Answers 2(pi)R/T ...Circumference/Period What is the direction of the centripetal force? - Answers The centripetal force points along the radius towards the center of the circle. What is the direction of the centripetal acceleration? - Answers The centripetal acceleration points along the radius towards the center of the circle. (Just like the centripetal force.) How is the centripetal force represented in a free body diagram? - Answers It is the net force pointing towards the center. A ball rolls inside a salad bowl. The ball is released along the top edge and rolls down before climbing to the same height on the opposite side of the bowl. What is the direction of the acceleration of the ball when it at the top edge of the bowl? - Answers It is towards the center and downwards a little. It is the sum of the normal force perpendicular to the bowl and the weight downwards. A ball rolls inside a salad bowl. The ball is released along the top edge and rolls down before climbing to the same height on the opposite side of the bowl. What is the direction of the acceleration of the ball when it at the bottom of the bowl? - Answers The acceleration is towards the center. It is supplied by the normal force and points towards the center.