Topics 1.3 and 1.4 - Momentum and Braking 0.0 / 5 ? PhysicsForces and MotionMomentumForces and BrakingIGCSEAQA Created by: Alice CullenCreated on: 20-12-16 12:04 What is the relationship between momentum, mass and velocity? Momentum = Mass x Velocity 1 of 9 What is Conservation of Momentum? This is when, in a closed system, the total momentum before an event is equal to the total momentum after an event 2 of 9 What is the relationship between force, change in momentum and time? Force = Change in Momentum ÷ Time 3 of 9 What happens to the resultant force when a vehicle travels at a steady speed? The resultant force is balanced with the driving force 4 of 9 What happens to the braking force as the speed of a vehicle increases? The greater the speed of the vehicle, the greater the braking force needed to stop it in a certain distance 5 of 9 What is the stopping distance? It is the sum of the distance travelled by the vehicle during the driver's reaction time and the distance it travels under the braking force 6 of 9 What can a driver's reaction time be altered by? Tiredness, use of drugs and alcohol 7 of 9 What happens when the brakes of a vehicle are applied? Work done by the friction force between the brakes and the wheel reduces the kinetic energy of the vehicle and the temperature of the brakes increases 8 of 9 How can a vehicle's braking distance be affected? Braking distance can be affected by adverse road and weather conditions or by the poor condition of the vehicle 9 of 9
Comments
No comments have yet been made