OCR AS Level Physics: Motion, Exam Questions with Complete Verified Answers

▪ Equation for average speed - AnsAverage speed = Distance travelled / Time taken ▪ What does a straight horizontal line on a distance-time graph symbolize? - AnsStationary object ▪ How is a stationary object shown on a distance-time graph? - AnsStraight horizontal line ▪ What does a straight, sloping line with a constant gradient on a distance-time graph symbolize? - AnsObject with a constant speed ▪ How to show an object with a constant speed on a distance-time graph - AnsStraight, sloping line with constant gradient ▪ How to calculate speed from a distance-time graph - AnsGradient ▪ What is the gradient of a distance-time graph? - AnsSpeed ▪ Instantaneous speed - AnsSpeed of a car over a very short time interval. ▪ Why average speed is bad for seeing if someone has gone over the speed limit - AnsPeople can go over the speed limit for part of the journey and then go way below for other parts and this would even out to show that the average speed is below the speed limit, even though the person has gone above it. ▪ How to find instantaneous speed - AnsTangent to a point ▪ Displacement is what type of quantity? - AnsVector ▪ Distance is what type of quantity? - AnsScalar ▪ Velocity is what type of quantity? - AnsVector ▪ Equation for average velocity - AnsAverage velocity = Change in displacement / Change in time ▪ What do lines with a negative gradient represent on a displacement-time graph? - AnsObject returning to its original position ▪ What does the gradient of a displacement-time graph symbolize? - AnsVelocity ▪ Acceleration - AnsRate of change of velocity ▪ Equation for acceleration - AnsAcceleration = Change in velocity / Time ▪ Unit of acceleration - Ansms^-2 ▪ Acceleration is what type of quantity? - AnsVector ▪ Why is acceleration a vector? - AnsIt is determined by velocity ▪ How to find acceleration from a velocity-time graph - AnsGradient ▪ What the gradient of a velocity-time graph represents - AnsAcceleration ▪ How to find displacement from a velocity-time graph - AnsArea underneath the graph