Motion and Time class 7 extra questions Download class 7 science extra questions 1. Answer the following What is the S.I unit of measurement for speed. What is a pendulum bob’s resting position called? What is the posture of the body called when it does not alter in relation to its surroundings? Name a device that measures the vehicle’s speed. Name a device that measures a vehicle’s distance traveled. What is the amount of time it takes a pendulum to complete one oscillation called? What is a pendulum’s metallic ball called? Name the material in which the crystals vibrate at an extremely rapid and accurate pace. Name a timepiece that uses the shadow of a pointer cast by the sun on a graded plate to display the time. 2. State True/False: A speedometer is an instrument to measure a vehicle’s speed at a particular speed. The speed of a car is always uniform. The kilometer is the SI unit of distance. Speed is a vector quantity. The speed of light is always faster than sound. 3. Match the
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