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- Question : 1Q - Look at Figure 1.2. The runner ran 10 000 m, and the clock shows the total time taken. Calculate his average speed during the race.
- Question : 2Q - Here are some units of speed: m s?1 mm s?1 km s?1 km h?1 Which of these units would be appropriate when stating the speed of each of the following? a a tortoise b a car on a long journey c light
- Question : 3Q - A snail crawls 12 cm in one minute. What is its average speed in mm s?1?
- Question : 4Q - A trolley with a 5.0 cm long card passed through a single light gate. The time recorded by a digital timer was 0.40 s. What was the average speed of the trolley in m s?1?
- Question : 5Q - Four methods for determining the speed of a moving trolley have been described. Each could be adapted to investigate the motion of a falling mass. Choose two methods which you think would be suitable, and write a paragraph for each to say how you would adapt it for this purpose.
- Question : 6Q - Which of these gives speed, velocity, distance or displacement? (Look back at the definitions of these quantities.) a The ship sailed south-west for 200 miles. b I averaged 7 mph during the marathon. c The snail crawled at 2 mm s?1 along the straight edge of a bench. d The sales representative
- Question : 7Q - A submarine uses sonar to measure the depth of water below it. Reflected sound waves are detected 0.40 s after they are transmitted. How deep is the water? (Speed of sound in water = 1500 m s?1.)
- Question : 8Q - The Earth takes one year to orbit the Sun at a distance of 1.5
- Question : 9Q - Sketch a displacement
- Question : 10Q - You walk 3.0 km due north, and then 4.0 km due east. a Calculate the total distance in km you have travelled. b Make a scale drawing of your walk, and use it to find your final displacement. Remember to give both the magnitude and the direction. c Check your answer to part b by calculating your displacement.
- Question : 11Q - A swimmer can swim at 2.0 m s?1 in still water. She aims to swim directly across a river which is flowing at 0.80 m s?1. Calculate her resultant velocity. (You must give both the magnitude and the direction.)
- Question : 12Q - A stone is thrown from a cliff and strikes the surface of the sea with a vertical velocity of 18 m s?1 and a horizontal velocity v. The resultant of these two velocities is 25 m s?1. a Draw a vector diagram showing the two velocities and the resultant. b Use your diagram to find the value of v. c Use your diagram to find the angle between the stone and the vertical as it strikes the water.

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