AQA Trilogy Physics Paper 2 Practice Exams Questions & Answers 2024/2025

AQA Trilogy Physics Paper 2 Practice Exams Questions & Answers 2024/2025 Force is a - ANS-vector quantity What do vectors have - ANS-Direction and magnitude. Force, velocity, displacement, acceleration, momentum What do scalar have - ANS-Direction. Speed, distance, mass, temperature, time A force can be a - ANS-push or a pull When two objects have to be touching for a force to act, - ANS-that force is called a contact force. If the objects do not need to be touching for the force to act, - ANS-the force is a non-contact force. Name some contact forces - ANS-Friction, air resistance Name some non-contact forces - ANS-Magnetic, gravitational, electrostatic What is weight? - ANS-The force acting on an object due to gravity. Weight = - ANS-Mass (Kg) x Gravitational Field Strength (N/kg) What is the resultant force? - ANS-It is the forces combined to show the result of the overall force. When a force moves an object through a distance, - ANS-energy is transferred and work is done. Work Done (J) = - ANS-Force (N)x Distance (m) If forces acting on an object combine to give a resultant force of zero: - ANS-the object is in equilibrium. If a object is elastically deformed - ANS-it can go back to its original shape and length after the force has been removed. An object has been inelastically deformed - ANS-if it doesn't return to its original shape and length after the force has been removed. (For springs) Force (N) = - ANS-Spring constant x Extension What is the spring constant? - ANS-How stiff the spring is, the stiffness depends on the material used. On a spring constant graph, what does a curve show? - ANS-It shows the extension is no longer proportional to force. The point where the extension is no longer proportional to the force is the - ANS-limit of proportionality Work done in stretching a spring can be found using this equation: - ANS-E = 1/2 x ke^2 or Elastic potential energy - 1/2 spring constant / extenstion^2 Speed is - ANS-how fast you're going with no regard to the direction. Velocity is - ANS-a speed in a given direction Acceleration is the - ANS-change in velocity in a certain amount of time. Word equation for acceleration: - ANS-Acceleration (m/s^2) = change in velocity (m/s) / Time (s) Constant acceleration is sometimes called - ANS-uniform acceleration. Velocity-time Graph - ANS-Gradient = Acceleration, Flat sections = Steady speed, Steeper the graph = Greater the acceleration A curve means changing acceleration. The area under the graph is equal to the distance travelled. What can reduce friction? - ANS-Lubricant What is drag? - ANS-The resistance you get in gas or liquid. What does a fluid represent? - ANS-A gas or a liquid What is the best way to reduce Drag, - ANS-streamlining the object. What does streamlined mean? - ANS-This is where the object is designed to allow fluid to flow easily across it, reducing drag. Objects with large surface areas tend to have - ANS-lower terminal velocities. What is Newton's First Law? - ANS-If the resultant force on a stationary object is zero, the object will remain stationary. If the resultant force on a moving object is zero, it'll just carry on moving at the same velocity. Acceleration is - ANS-inversely proportional to the mass of the object. What is the formula for Newton's second law? - ANS-F = ma, Resultant force (N) = Mass (kg) x Acceleration (m/s^2) What is inertia? - ANS-This is the tendency to continue in the same state of motion. A objects inertial mass - ANS-measures how difficult it is to change the velocity of an object. To find the inertial mass you use - ANS-m = F / a Newton's Third Law says: - ANS-When two objects interact, the force they exert on each other are equal and opposite. If two people push on each other, - ANS-the person will the smaller mass will move further due to a = F / m continues...