This quiz works best with JavaScript enabled. Home > Science > Physics > Physics Basics > Physics – Quiz 47 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Physics Quiz 47 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. You drop a 5.00 kg ball from a height of 2.00 m. What is its velocity right before it hits the ground? A) 40.0 m/s. B) 4.47 m/s. C) 6.32 m/s. D) 100 m/s. Show Answer Correct Answer: C) 6.32 m/s. 2. What is the definition of energy? A) The ability to do work. B) The ability to apply a force. C) The distance an object moves. D) How fast an object moves. Show Answer Correct Answer: A) The ability to do work. 3. Black surfaces are: A) Neither good absorbers, nor good emitters of infra-red radiation. B) Good absorbers, but poor emitters of infra-red radiation. C) Poor absorbers, but good emitters of infra-red radiation. D) Both good absorbers and emitters of infra-red radiation. Show Answer Correct Answer: D) Both good absorbers and emitters of infra-red radiation. 4. A concave mirror gives real, inverted and same size image if the object is placed A) At F. B) At infinity. C) At C. D) Beyond C. Show Answer Correct Answer: C) At C. 5. Two vectors of magnitudes 25 and 15 are added together. The minimum magnitude of the resultant vector is ..... A) 25. B) 15. C) 10. D) 40. Show Answer Correct Answer: C) 10. 6. Definition of work A) The amount of energy transferred when an object is moved over a distance by an external force in regards to the direction of the displacement. B) The rate of energy transferred per second. C) The amount of energy transferred in motion. D) The amount of energy an object has at rest / before motion. Show Answer Correct Answer: A) The amount of energy transferred when an object is moved over a distance by an external force in regards to the direction of the displacement. 7. Mr. Hardens class decides to perform an experiment to determine how long it takes different objects to hit the floor when dropped from a desk. The class dropped 3 balls from a desk, one weighing 2 lbs, one weighing 4 lbs and 6 lbs. It took them all the same amount of time to hit the floor. After evaluation these results, you predict that a 10 lb ball will take A) More time to hit the floor. B) Less time to hit the floor. C) About the same amount of time to hit the floor. D) An unknown amount of time before hitting. Show Answer Correct Answer: C) About the same amount of time to hit the floor. 8. Average speed is calculated ..... A) By dividing the total distance by the total time. B) By dividing distance by time. C) By multiplying mass and acceleration. D) None of above. Show Answer Correct Answer: A) By dividing the total distance by the total time. 9. A baker makes a loaf of bread. Identify the area of physics that this involves A) Optics. B) Thermodynamics. C) Mechanics. D) Relativity. Show Answer Correct Answer: B) Thermodynamics. 10. Which value and symbol are incorrectly paired? A) Work and joules. B) Force and newton. C) Power and watt. D) Potential energy and watt. Show Answer Correct Answer: D) Potential energy and watt. 11. Pressure is equal to A) Force / Area. B) Force x Area. C) Force x Mass. D) Force / Mass. Show Answer Correct Answer: A) Force / Area. 12. Bungee jumping is a sport that involves a lot of motion. What major area of Physics study motion? A) Relativity. B) Quantum mechanics. C) Optics. D) Mechanics. Show Answer Correct Answer: D) Mechanics. 13. Suppose you are conducting an experiment concerning gravities effects on falling objects, and you want to minimize air resistance. Which of these would be the most useful and practical way to do these? A) Use aerodynamic objects. B) Se extremely dense objects. C) Conduct the experiment in vaccum. D) Conduct the experiment at various altitudes. Show Answer Correct Answer: C) Conduct the experiment in vaccum. 14. The weight of an object on an inclined plane is ..... to the normal force A) Less than. B) Greater than. C) Equal to. D) Depends on the problem. Show Answer Correct Answer: B) Greater than. 15. What is the formula for converting Celsius to Kelvin? A) OC + 273. B) K-273. C) (oF-32) x (5/9). D) OC x (9/5) + 32. Show Answer Correct Answer: A) OC + 273. 16. Motion can be described as ..... A) Speed. B) Velocity. C) Acceleration. D) All of these. Show Answer Correct Answer: D) All of these. 17. The SI unit of frequency is the ..... A) Meter. B) Second. C) Hertz. D) Meter per second. Show Answer Correct Answer: C) Hertz. 18. A girl is pedaling her bicycle at a speed of 0.10 km/min. How far will she travel in two hours? (pay attention to units) A) 20 km. B) .2 km. C) 3 km. D) 12 km. Show Answer Correct Answer: D) 12 km. 19. Which of the following are used as reflectors in street lights to spread the light over a wide area? A) Concave mirrors. B) Plane mirrors. C) Convex mirrors. D) Convex lens. Show Answer Correct Answer: C) Convex mirrors. 20. These are the category of hadrons that contain three quarks. This distinguishes them from mesons, which contain two (1 quark and 1 antiquark). A) Gluons. B) Electrons. C) Leptons. D) Baryons. Show Answer Correct Answer: D) Baryons. ← PreviousNext →Related QuizzesPhysics QuizzesScience QuizzesPhysics Quiz 1Physics Quiz 2Physics Quiz 3Physics Quiz 4Physics Quiz 5Physics Quiz 6Physics Quiz 7Physics Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books