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Year 11 Physics Physics Assessment 1 Moving About Topic Test Preliminary Physics, Assessment Task 1 Total Possible Marks: 43 1. A motorbike can travel 0-100 m in 6.6 s. Answer these questions: a. What is its average velocity [1] b. How far would it travel in 72 min if it remained at this velocity [1] 2. Explain the difference between distance and displacement [1] 3. Explain the difference between speed and velocity [1] 4. The force of gravity on the Moon is 1/6 that experienced on Earth. If a box has a mass of 10 kg on earth what is its mass and its weight on the Moon. [1] 5. Sketch small velocity-time AND displacement-time graphs of the following scenarios: [4] a. Accelerating motion b. Decelerating motion c. Constant velocity motion d. Stationary object 6. Write Newtons 3 Laws in your own words and a real-world example where of each of the laws apply [6] 7. Explain how are work and energy are related [2] 8. Describe the relationship between momentum and impulse [2] 9. Write an explanation for instantaneous velocity [1] 10. Write an explanation for average velocity [1] 11. Describe the energy transformations that occur in the following scenarios [2] a. A solar cell running a light tinyrock.com 17/10/2008 Year 11 Physics Physics Assessment 1 b. Car crashing into a barrier c. A battery operating an ipod d. A jug boiling water 12. Draw a vector diagram, including the resultant vector, of the following scenario using SI units. [2] A boat is attempting to cross a river. The boat is travelling at its maximum speed of 30 km/h. The river is flowing to the left at 10 km/h. 13. F1 cars must pass a “Frontal Impact Test”. When hit by a mass of 780 kg travelling at 10 m/s. The damage must not extend beyond the first 0.82 m of the cars bonnet. [2] a. What is the kinetic energy of the mass which hits the car during the test b. At the end of the Frontal Impact Test, when nothing is moving, all this kinetic energy has been “lost”. Where did it go? 14. A moving truck travelling at 15 m/s north has a mass of 2000 kg. It collides with a stationary 1500 kg car. If the car and truck stick together, what type of collision is this and what would be the velocity of the wreck after the collision? [4] 15. If a car exerts a force on a caravan. Which of the following forces is the reaction force? [1] a. The pull of the caravan on the car b. The force of gravity on the car c. The force developed at the axels of the caravan d. The force of friction between the wheels of the caravan and the road 16. A 1500 kg car moves from a set of traffic lights along a straight road until it reaches a speed of 28 m/s. This occurs over 4 seconds. Determine: [3] a. The acceleration of the car b. The force needed to achieve this acceleration tinyrock.com 17/10/2008 Year 11 Physics Physics Assessment 1 c. The momentum of the car at the end of this acceleration 17. A car engine exerts a force of 500 N in moving the car 1000 m in 200 s. What is the work done by the engine? [2] 18. Draw a displacement verse time graph of the following journey. Draw the cat and the dog and the graph. And answer this question: Who won the race? [4] A dog and a cat are having a race. The track is 15 m long. The cat gets a head start of 2 m. The cat runs north at 2 m/s for 13 m. The dog runs the 15 m after it but at 3m/s, then stops and thinks for 2 s about which way to run now. The cat runs south back towards the finish line at 2 m/s, the dog quickly follows at 4 m/s. 19. Explain how either a seatbelt OR an airbag protects the occupants of a car. Use at least one physics concept in your explanation. [3] tinyrock.com 17/10/2008