Physics P2 1.2 Velocity and acceleration. 0.0 / 5 PhysicsForces and MotionGCSEAQA Created by: Atlanta and JacobCreated on: 24-09-16 10:33 What is velocity? It is speed in a given direction. 1 of 15 What is the change of velocity per second? Acceleration. 2 of 15 What is the equation for acceleration? a = v-u over t (look up). 3 of 15 What is the speed of an object in a given direction? Its velocity. 4 of 15 What happens when an object changes direction, even if its speed stays the same? The velocity of the object changes. 5 of 15 What do we say if the velocity of an object changes? We say that it accelerates. 6 of 15 In the equation for acceleration, what is a? The acceleration in metres per second squared (m/s^2). 7 of 15 In the equation for acceleration, what is v? The final velocity in metres per second (m/s). 8 of 15 In the equation for acceleration, what is u? The initial velocity in metres per second (m/s). 9 of 15 In the equation for acceleration, what is t? The time taken for the change in seconds (s). 10 of 15 What does it mean if the value calculated for acceleration is negative? The body is decelerating (slowing down). 11 of 15 What a negative acceleration the same as? A deceleration. 12 of 15 What is the difference between speed and velocity? Velocity is speed in a particular direction. 13 of 15 What is the SI unit of acceleration? Metres per second squared (m/s^2). 14 of 15 **BE SURE TO LEARN THE UNITS HERE CAREFULLY** **DON'T CONFUSE m/s (UNIT OF SPEED AND VELOCITY) AND m/s^2 (UNIT OF ACCELERATION). 15 of 15

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