AQA GCSE Physics -Paper 2 Practice Test Questions & Answers 2024/2025

AQA GCSE Physics -Paper 2 Practice Test Questions & Answers 2024/2025 AQA GCSE Physics -Paper 2 Practice Test Questions & Answers 2024/2025 Scalar - ANSWER-quantities with only magnitude such as speed, distance, time and mass. Vector - ANSWER-quantities with a magnitude and direction e.g. acceleration, force momentum and weight. A vector quantity can be represented as an arrow, the size representing the magnitude and the direction, the direction. Non-contact force - ANSWER-the objects are physically separate e.g. magnetism/gravity/electrostatic. 3 non-contact forces - ANSWER-magnetism gravity electrostatic Contact force - ANSWER-objects are physically touching. 3 contact forces - ANSWER-friction resistance tension Gravity - ANSWER-Weight is the force acting on an object due to gravity, it acts on an objects 'Centre of mass' and is directly proportional to mass Weigh Equation - ANSWER-Weight = mass x grav. field strength Resultant forces - ANSWER-A number of forces acting on an object may be replaced by a single force that has the same effect as all the original forces acting together, this single force is the called the resultant force. In a tug of war, 1000N to the left and 800N to the right. The resultant force is 200N to the left Free-Body force diagrams - ANSWER-When an object is acted on by more than one force you can draw a free-body force diagram to work out the resultant force on the object. It shows the forces acting on an object without any other objects or other forces shown. Each force is shown on the diagram by a vector, which is an arrow pointing in the direction of the force. (the normal force is that component of the contact force that is perpendicular to the surface that an object contacts) How to resolve forces (force diagram steps) - ANSWER-1. Decide on a scale of N per cm. 2. Draw the 2 given forces, giving respect to their length (more cm if more N) and the angle that you are given 3. Draw a line connecting the end of the 2 other lines to form a triangle 4. Measure the length of this line, then convert it to N by using the scale Relationship between Joules and work done - ANSWER-When a force causes and object to move, work is done on the object so when the force causes displacement. One joule of work is done when a force of 1 newton displaces an object 1 metre. 1 Joule = 1 newton-metre. Equation for word done - ANSWER-work done = force x distance Elastic Deformation - ANSWER-When an elastic object is stretched, bent, twisted or compressed it will return to its original form Inelastic Deformation - ANSWER-Polyethene bags will not return to their original shape after being deformed, this is inelastic. Hooke's Law - ANSWER-The extension of an elastic object is directly proportional to the force applied as long as the limit of proportionality is not exceeded: Equation for force (Hooke's law) - ANSWER-force = spring constant x extension Extension and compression's relationship with elastic potential energy explanation - ANSWER-A force that stretches or compresses a spring does work and elastic potential energy is stored in the spring, provided the spring is not elastically deformed, the work done and elastic potential energy are equal. Before the limit of proportionality is breeched the relationship is linear (directly proportional) afterwards it is non-linear Elastic potential energy equation (given) - ANSWER-Elastic potential energy = 1/2 x spring constant x extension^2 Moment meaning - ANSWER-The turning effect of a force is called its 'moment' Moment equation - ANSWER-moment = force x distance CONTINUES...