ENERGY WORK AND ENERGY 11 Class 9th Science (Physics) (Practice Sheet) 1 What is the energy possessed by an object due to its motion called? A. Potential energy B. Thermal energy C. Kinetic energy D. Chemical energy 2 The energy stored in a stretched rubber band is an example of: A. Potential energy B. Kinetic energy C. Mechanical energy D. Nuclear energy 3 According to the law of conservation of energy, in an isolated system: A. Energy cannot be created B. Energy cannot be destroyed C. Energy cannot change forms D. Energy cannot move 4 Which of the following energy types is associated with the position or height of an object? A. Kinetic energy B. Chemical energy C. Potential energy D. Thermal energy 5 A moving car possesses both kinetic energy and potential energy. Which of the following has the most influence on its kinetic energy? A. The car's speed B. The car's mass C. The car's color D. The car's shape 6 How much work is required to stop the car in 30 s if the kinetic energy of the car is 6000 J? 7 Two passengers of mass 40kg each sit in the car then find the new kinetic energy of car if the mass of the car is 700kg and velocity of the car is 18km/h. 8 Calculate the work done. Find the work done by the 10N force acting on the object at the angle of 60°, which displaces the object by 10m. 9 245 × 102 J of energy were used to raise a 50kg boy above the ground. How high would he be raised? And also, find the P.E of 20kg stone which is kept 8m above the ground. 10 Find the power required to lift 600kg of water to store in a tank at the height of 1600cm in 10s. Page 1 Email: Phone No: Website:
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