Physics mock quiiiz.pdf

1. What is the unit of energy? A) Joule (J) B) Watt (W) C) Kilowatt (kW) D) Calorie (cal) 2. Which of the following is a form of kinetic energy? A) Thermal energy B) Electrical energy C) Chemical energy D) Mechanical energy 3. What is the formula for power? A) P = E / t B) P = E x t C) P = F x d D...

1. What is the unit of energy? A) Joule (J) B) Watt (W) C) Kilowatt (kW) D) Calorie (cal) 2. Which of the following is a form of kinetic energy? A) Thermal energy B) Electrical energy C) Chemical energy D) Mechanical energy 3. What is the formula for power? A) P = E / t B) P = E x t C) P = F x d D) P = m x v 4. Which device converts electrical energy into light energy? A) Motor B) Generator C) Transformer D) Light bulb 5. What is the unit of power? A) Joule (J) B) Watt (W) C) Kilowatt (kW) D) Calorie (cal) 6. Which of the following is a form of potential energy? A) Kinetic energy B) Thermal energy C) Electrical energy D) Gravitational energy 7. What is the efficiency of a machine? A) Output energy / Input energy B) Input energy / Output energy C) Output energy x Input energy D) Input energy + Output energy 8. Which machine converts mechanical energy into electrical energy? A) Generator B) Motor C) Transformer D) Engine 9. What is the formula for kinetic energy? A) K = 1/2 mv^2 B) K = mv^2 C) K = m / v^2 D) K = v / m 10. Which of the following is a form of renewable energy? A) Fossil fuel B) Nuclear energy C) Solar energy D) Chemical energy 11. What is the force that opposes motion between two surfaces in contact? A) Gravity B) Friction C) Magnetism D) Electromagnetism 12. Which type of friction occurs when an object is stationary? A) Kinetic friction B) Static friction C) Rolling friction D) Fluid friction 13. What is the coefficient of friction? A) The ratio of normal force to frictional force B) The ratio of frictional force to normal force C) The sum of normal force and frictional force D) The difference between normal force and frictional force 14. Which surface has the highest frictional force? A) Smooth surface B) Rough surface C) Flat surface D) Curved surface 15. What is the force that opposes the motion of an object? A) Thrust B) Drag C) Friction D) Gravity 16. Which type of friction occurs when an object is rolling? A) Kinetic friction B) Static friction C) Rolling friction D) Fluid friction 17. What is the formula for frictional force? A) F = ma B) F = μN C) F = mv D) F = mg 18. Which factor affects the frictional force? A) Surface area B) Normal force C) Temperature D) All of the above 19. What is the purpose of lubricants? A) To increase friction B) To decrease friction C) To maintain friction D) To eliminate friction 20. Which type of friction occurs when an object is moving? A) Kinetic friction B) Static friction C) Rolling friction D) Fluid friction