Physics revsion P2a Year 11 Mock 2.0 / 5 based on 1 rating ? PhysicsP2a without electricityGCSEAQA Created by: EmeraldroseCreated on: 06-12-14 11:47 On a distance-time graph, what does steady speed look like? straight uphill or downhill sections 1 of 19 On a distance-time graph, what does accelerating look like? curve going upwards (increasing gradient) is acceleration, levelling off is deceleration 2 of 19 On a distance-time graph, what does stationary look like? a line parallel to the x axis 3 of 19 On a distance-time graph, what does the gradient tell you? the speed: S=D/T 4 of 19 What does acceleration mean? how can you work it out? unit? acc^= change in velocity/time taken for change in m/s/s OR f=ma, a=f/m 5 of 19 On a velocity-time graph, what does a steady speed look like? a line parallel to the x axis 6 of 19 On a velocity-time graph, what does acceleration look like? a straight line upwards or downwards, or a curved line means increasing or decreasing acceleration 7 of 19 On a velocity-time graph, what does stationary look like? anywhere touching the x axis (y=0) 8 of 19 On a velocity-time graph, what does the gradient represent? The acceleration. 9 of 19 w=mg means what? weight = mass x gravity 10 of 19 what is a resultant force? The overall force acting on a mass 11 of 19 a resultant force means that what will happen? a change in velocity; acceleration or deceleration 12 of 19 what are reaction forces? They are equal and opposite to each other 13 of 19 what is friction? what forms of it are there? you get friction between any two points of contact between objects. Friction always opposes movement. -drag/air resistance 14 of 19 What does the term 'terminal velocity' mean? that an object has reached its maximum speed and will now fall at a steady speed 15 of 19 What is work done? work done= force x distance. when a force moves an object through a distance, work is done. 16 of 19 What is the formula for Gravitaional Potential energy? Ep= m x g x h 17 of 19 What is the formula for Kinetic energy? Ke= 1⁄2 × mass × velocity2 18 of 19 what is velocity using the formula for Ke? v= squareroot of: 2Ek/mass 19 of 19
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