An experiment is carried out to find the acceleration of free fall.A strip of paper is attached to a heavy object. The object is dropped and falls to the ground, pullingthe paper strip through a timer. The timer marks dots on the paper strip at intervals of 0.020 s.Fig. 1.1 shows a section of the paper strip with the first three dots marked. The first dot on thepaper strip, labelled A, is marked at the instant the object is dropped.0.0076 mpaper stripA 0.0019 mFig. 1.1 (not to scale)(a) State how the dots on the paper strip show that the object is accelerating............................................................................................................................... ................................................................................................................................................... .................[1](b) Calculate the average speed of the object(i) in the first 0.020 s after the object is dropped,average speed = .............................................................(ii) in the second 0.020 s after the object is dropped.average speed = .............................................................[3](c) Use the results from (b) to calculate the acceleration of the falling object.acceleration = .........................................................[3][Total: 7]Save My Exams! – The Home of RevisionFor more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/3

What name is given to the type of motion which occurs when an object is accelerating and the only force which is acting on it is its weight?Weight-based accelerationFast fallFree fallFalling downwards2An object is released from rest and undergoes free fall. What will its velocity-time graph look like?A curveA horizontal lineA straight line which starts above the origin and which slopes downwards to the rightA straight line which starts from the origin and slopes upwards to the right3A paper ball is released from rest, and goes on to fall through a large vertical distance. As it falls through the air, it is acted upon by two forces – air resistance and its weight. Which of the following correctly describes its motion after it is dropped?It will accelerate at an increasing rate and then reach its terminal velocityIt will accelerate uniformlyIt will accelerate at a decreasing rate and then reach its terminal velocityIt will accelerate uniformly before reaching its terminal velocity4A feather is released from rest. As it falls through the air, it is acted upon by two forces – air resistance and its weight. By the time it has reached its terminal velocity, which of the following mathematical statements correctly describes the magnitudes of these two forces?Weight = air resistanceAir resistance < weightWeight < air resistanceWeight > air resistance5A rubber duck is released from rest near the surface of the Earth. It then goes on to fall through a large vertical distance, and eventually reaches its terminal velocity. What would happen if this same experiment was repeated near the surface of the Moon?It would reach a higher terminal velocity than it did on EarthIt would reach the same terminal velocity that it did on EarthIt would reach a lower terminal velocity than it did on EarthIt would not reach a terminal velocity, but would continue accelerating uniformly until it hit the surface of the Moon

A paper ball is released from rest, and goes on to fall through a large vertical distance. As it falls through the air, it is acted upon by two forces – air resistance and its weight. Which of the following correctly describes its motion after it is dropped?It will accelerate at an increasing rate and then reach its terminal velocityIt will accelerate uniformly before reaching its terminal velocityIt will accelerate uniformlyIt will accelerate at a decreasing rate and then reach its terminal velocity

What happens to the acceleration of a falling object as it speeds up?2 marksIt remains constantIt decreasesIt increasesIt becomes zero

Which graph best represents the relationship between acceleration and time for a freely falling object as theobject falls near the surface of Earth?

What is the acceleration of a free-falling object on Earth?