Forces 0.0 / 5 ? PhysicsForcesGCSEAQA Created by: Jason WhiteleyCreated on: 12-03-14 19:49 What are the forces like when two objects interact? Equal and opposite 1 of 16 What is the resultant force? A single force that can replace all forces and have the same effect as all original forces acting together 2 of 16 What may a resultant force acting on an object cause? To change its state of rest or motion 3 of 16 What will happen to a stationary object if the RF is zero? It will remain stationary 4 of 16 What will happen to a stationary object if the RF is not zero? It will accelerate in direction of resultant force 5 of 16 What will happen to a moving object if the RF is zero? It will continue to move at same speed and same direction 6 of 16 What will happen to a moving object if the RF is not zero? It will accelerate in direction of resultant force 7 of 16 What is the equation for working out RF? Explain. F = m x a - F= resultant force (N) - m= mass (kg) - a= acceleration (m/s²) 8 of 16 What does the gradient on a distance-time graph represent? Speed 9 of 16 What is the equation for working out acceleration? Explain. a = v - u / t - a= acceleration (m/s²) - v= final velocity (m/s) - u= inital velocity (m/s) - t- time (s) 10 of 16 What does gradient represent on a velocity-time graph? Acceleration 11 of 16 What do the forces balance when a vehicle travels at a steady speed? Resistive forces balance the driving force 12 of 16 What is the stopping distance the sum of? Reaction time and the braking force 13 of 16 What can a driver's reaction time be affected by? Tirdness, drugs and alcohol 14 of 16 What happens when the brakes of a vehicle are applied? Work done by the friction force between the brakes and the wheel reduces kinetic energy and the temperature of the brakes increases. 15 of 16 What can a vehicle's braking distance be affected by? Adverse road, weather conditions and poor condition of the vehicle 16 of 16
Comments
No comments have yet been made