Edexcel GCSE Triple Science Physics Paper 2 2024 WITH QUESITIONS AND ANSWERS GRADED A+

Edexcel GCSE Triple Science Physics Paper 2 2024 WITH QUESITIONS AND ANSWERS GRADED A+ Difference between scalar and vector: - CORRECT ANSWER--scalar = magnitude only -vector = direction and magnitude The only vector quantities are: - CORRECT ANSWER--acceleration -velocity -force -displacement -momentum -weight Force - CORRECT ANSWER--a push or a pull Balanced forces - CORRECT ANSWER--when 2 forces acting on an object are equal in size but act in opposite direction What is Newton's 1st Law? - CORRECT ANSWER--if forces acting on an object are balanced, the resultant force is zero -object at rest, stay stationary -object moving, continues to move in same direction and at same speed What is Newton's 2nd Law? - CORRECT ANSWER--acceleration is proportional to resultant force -inversely proportional to mass of object What is Newton's 3rd Law? - CORRECT ANSWER--two objects exert equal and opposite forces on each other Terminal Velocity - CORRECT ANSWER- Describe the process of terminal velocity - CORRECT ANSWER--weight acts downwards -drag acts upwards -person accelerated downwards -eventually weight = drag -no resultant force, no acceleration, forces are balanced -terminal velocity (constant velocity) is reached If an object gains momentum - CORRECT ANSWER--increasingly difficult to slow down or change its direction -momentum is a vector quantity Vector Quantity - CORRECT ANSWER--has a magnitude and a direction Scalar Quantity - CORRECT ANSWER--magnitude only Conservation of Momentum - CORRECT ANSWER--as long as there is no other forces, the total momentum in an explosion or a collision stays the same Momentum = - CORRECT ANSWER-mass x velocity Explain how a seat belt prevents serious injuries - CORRECT ANSWER--same momentum change -but time of impact increases -reducing force felt -seat belt stretches increasing surface area over which force acts -pressure on body reduces What is the definition of inertia? - CORRECT ANSWER--an objects tendency to stay at rest or in uniform motion How do you calculate inertial mass? - CORRECT ANSWER-inertial mass = force/acceleration