Physics 0.0 / 5 ? PhysicsForces and MotionGCSEAQA Created by: Jamie HallCreated on: 11-11-19 20:31 What is the equation for Acceleration? Acceleration (M/S^2) = Change in Velocity (M/S) / Time Taken (S) 1 of 17 On a velocity time graph what is the area under the graph? Distance Travelled 2 of 17 What is a scalar? A physical quantity such as a mass or energy that has a magnitude. 3 of 17 What is a vector? Has a magnitude and a direction. Most things that are negative are vectors. 4 of 17 How are centre of mass and centre of gravity related? Centre of mass = Centre of gravity 5 of 17 What happens of a resultant force is zero? If the resultant force is zero, the object stays at rest or at the same speed and direction. 6 of 17 What happens if two forces act on an object? If two forces act on an object the resultant force is their sum if in the same direction or their difference if in opposite direction. 7 of 17 What is the equation for speed? Speed (M/S) = Distance (M) / Time (Sec) 8 of 17 What does Newtons first law state? That an object will stay at rest unless acted upon by an external force 9 of 17 What does Newtons second law state? The acceleration of an object is proportional to the resultant force and inversely proportional to the mass of the object. 10 of 17 What is the equation for acceleration? Acceleration (M/S^2) = Force (N) / Mass (Kg) 11 of 17 What is the thinking distance? Distance from seeing an object to applying the breaks. 12 of 17 What is the braking distance? Distance from brakes being applied to stopping. 13 of 17 What is the stopping distance? The sum of the thinking distance and braking distance. 14 of 17 Factors that affect thinking distance? Alcohol, Tiredness, Drugs, Distractions, Speed, Medication 15 of 17 Factors that affect braking distance? Condition of brakes, Weather conditions, Tyre conditions, Speed 16 of 17 What is the equation for Momentum? Momentum (Kg M/S) = Mass (Kg) x Velocity (M/S) 17 of 17
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