Physics P3 Ocr Gateway B, Top Questions and answers, 100% Accurate. VERIFIED.

Physics P3 Ocr Gateway B, Top Questions and answers, 100% Accurate. VERIFIED. What is the equation for distance?--Distance = speed / time What is the equaion for average speed?--Average speed = (u + v) / 2 Distance time graphs a) What does the gradient represent? b) What do flat sections represent? c) A steeper gradient means what? d) Curves represent what? e) A "downhil" section means what?--a) Speed b) The vehicle has stopped c) A faster speed d) Acceleration/deceleration e) It's changed direction and is coming back to its starting point How do you calculate speed from a distance time graph?--Using the gradient (y/x) What is acceleration?--How quickly the speed is changing You can also accelerate when changing direction, with or without changing speed What is the equation for acceleration?--Acceleration = change in speed / time taken Speed time graphs a) What does the gradient represent? b) What do flat parts of the graph represent? c) What does a steeper gradient mean? d) What do uphill and downhill sections mean? e) What does a curve mean?--a) Acceleration b) Steady speed c) Greater acceleration/deceleration d) Uphill = acceleration Downhill = deceleration e) Non–uniform (changing) acceleration/deceleration How do you work out the distance travelled from a speed time graph?--The area under the graph Eg Triangle = (bxh) / 2 What is the difference between mass and weight?--Mass = a measure of how much matter is in an object Weight = caused by the pull of gravity and is a force What is the equation for weight?--weight = mass x gravitational field strength What are the 6 different types of forces?--1. Gravity or weight = always downwards 2. Reaction force from a surface = usually upwards 3. Thrust/push/pull due to an engine/rocket speeding something up 4. Drag/air resistance/friction = slowing something down 5. Lift due to a plane wing 6. Tension in a rope/cable How must the forces be in order for an object to be stationary?--Balanced Force of gravity acts down Causes a reaction force from the surface, pushing up How must the forces be in order for a steady horizontal speed?--Balanced Force of gravity/weight acts down Reaction force from surface, pushing up Thrust Drag/air resistance How must the forces be in order for horizontal acceleration?--Unbalanced A larger thrust than air resistance/drag (Gravity and reaction force are still balanced) How must forces be in order for a steady vertical speed?--Balanced Weight acts downwards