P3 0.0 / 5 ? PhysicsForces and MotionWork and powerGCSEOCR Created by: CaitlinRyburnCreated on: 18-04-14 11:43 If the forces acting on a object are balanced, the object is...? At constant speed 1 of 14 If the forces acting on an object are unbalanced what happens to the object? It speeds up or slows down 2 of 14 What is the formula for force? Force= mass x acceleration 3 of 14 Why may reaction time and thinking distance be increased? (4 things) If the driver is: 1- tired, 2- under the influence of alcohol or other drugs, 3-travelling faster, 4- distracted or lacks concentration 4 of 14 Why might breaking distance increase? (3 things) 1- The road conditions are poor, 2- the car hasn't been properly maintained, 3-If the speed is increased 5 of 14 What factors affect braking distance? (4 things) 1- The mass of the vehicle, 2- the speed of the vehicle, 3- worn breaks, 4- tyres with little tread 6 of 14 How does thinking distance increase with speed? Linearly 7 of 14 How does breaking distance increase with speed? As a squared realtionship 8 of 14 What is the formula for work done? Work done= force x distance moved (In the direction of the force) 9 of 14 What is weight? A measure of the gravitational attraction on a body acting towards the centre of the earth 10 of 14 What is the formula for weight? Weight= mass x gravitational field strength 11 of 14 What is power? Power is the rate at which work is done 12 of 14 What is the formula for power? Power= work done/time 13 of 14 How can the equation for power be rearranged? (2 ways) work done= power x time and time taken = work done/power 14 of 14
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