Welcome to your Energy, Work and Power(Senior Class Physics Study by Topics) NAME EMAIL PHONE NUMBER 1. A ball is projected into the air with 100 J of kinetic energy which is transformed to gravitational potential energy at the top of its trajectory. When it returns to its original level after encountering air resistance, its kinetic energy is _____. Not enough information given. 100 J. Less than 100 J. More than 100 J. None 2. Which of the following is an example of inelastic collision? Collision between glass balls Collision between two vehicles Collision between two railway compartments A bullet fired into a wooden block None 3. As an object goes up a hill at constant velocity, which of the following is NOT true? The object's Kinetic Energy is constant. The object's Potential Energy is increasing. The object's speed is constant. The object's Kinetic Energy is decreasing. None 4. What happens to the total energy of a moving object if all the applied forces are conserved? The velocity is required to answer this question It increases It remains constant It decreases None 5. A person jumps to the ground from a platform 10 feet high. Which of the following is true? The person's kinetic energy at the instant they jump is approximately double their potential energy the instant they land. The person has less potential energy at the top of the platform than in the air. The person's potential energy at the instant they jump is approximately equal to their kinetic energy the instant they land. The person has more kinetic energy before they jump than after they jump. None 6. If an object has kinetic energy, then it also must have ____ Acceleration Speed Force Impulse None 7. A person is holding a bucket by applying a force of 10N. He moves a horizontal distance of 5m and then climbs up a vertical distance of 10m. Find the total work done by him? 100J 200J 50J 150J None 8. When a body falls freely under gravity, then the work done by the gravity is ________ Positive Zero Infinity Negative None 9. When a massive body collides against a light body at rest ____ The massive body comes to rest The velocity of the bodies get exchanged The light body rebounds The light body starts moving None 10. When a body slides against a rough horizontal surface, the work done by friction is _____ Negative Positive Zero Constant None 11. A gardener pushes a lawn roller through a distance of 20m. If he applies a force of 20kg weight in a direction inclined at 60° to the ground, find the work done by him. (g=9.8m/s^{2}) 400J 2514J 250J 1960J None 12. If a mass is at rest, what must be applied to cause it to move? Kilograms Speed Force Vectors None 13. Collision between two carom coins is an example for ____ Elastic collision Oblique collision Inelastic collision Perfectly inelastic collision None 14. When a light body collides with a massive body at rest _____ No reaction happens The light body rebounds after the collision The massive body rebounds after the collision The light body Remains at rest None 15. Which of the following is NOT a consequence of "The Law of Conservation of Energy"? It is not necessary to use Kinematics to discover the velocity of an object accelerated by gravity if you know it's initial Potential Energy and its mass. Potential Energy can never be greater than Kinetic Energy The energy in a closed system is always constant The Kinetic Energy of a dropped object at the instant it hits the ground is roughly equal to the potential energy of the object at the instant it was dropped None 16. An object that has potential energy has this energy because of its ____ Speed. Acceleration. Momentum. Location None 17. The kinetic energy of an object will increase the most if you _______________ Double the velocity of the object Double the mass of the object Double the potential energy Double the temperature of the object None 18. For a body moving in a circular path, the work done by the centripetal force is ________ Positive Zero Negative Constant None 19. If you have to push a car forward, what are the forces acting on you? No forces act on you. Your own muscles push you down. Only gravity. The car pushes back on you, gravity pulls you down, the ground pushes up on you, and friction on your shoes pushes forward on you. None 20. If a force acts perpendicular to the direction of motion of a body, what is the amount of work done? Infinity Zero Constant Sinθ None 21. A truck drives slams on the brakes of a moving truck with a constant velocity v, as a result of his action the truck stops after traveling a distance d. If thedriver had been traveling with twice the velocity, what would be the stopping distance compared to the distance in the first trial? Half as much One-quarter as much Four times greater Two times greater None 22. When an object is lifted 10 meters, it gains a certain amount of potential energy. If the same object is lifted 20 meters, its potential energy is ______. The same Less. Twice as much. Four times as much None 23. A car is accelerated on a leveled road and attains a velocity 4 times of its initial velocity. In this process, the kinetic energy of the car. Becomes 16 times to that of the initial Becomes four times to that of the initial Becomes twice to that of the initial Remains the same None 24. A car travels with a constant speed of 15 m/s. The car’s engine produces a 4000 N pushing force in order to keep the speed constant. How much power isdeveloped by the engine? 60 W 60000 W 600 W 6000 W None 25. For a collision to occur, the actual physical contact is necessary. False True None 1 out of 25 Time's upTime is Up!