Welcome to your Energy, Work and Power(Senior Class Physics Study by Topics) NAME EMAIL PHONE NUMBER 1. A bullet fired from a gun can pierce a target due to its ___________ Kinetic energy Heat energy Mechanical energy Acceleration 2. Two identical arrows, one with twice the kinetic energy of the other, are fired into a hay bale. The faster arrow will penetrate _____. Twice as far as the slower arrow. More than four times as far as the slower arrow. The same distance as the slower arrow. Four times as far as the slower arrow. 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 Kinetic Energy is decreasing. The object's Potential Energy is increasing. The object's speed is constant. 4. When a gas filled in a cylinder fitted with a movable piston is allowed to expand, the work done by the gas is positive. False True 5. Collision between two carom coins is an example for ____ Perfectly inelastic collision Inelastic collision Elastic collision Oblique collision 6. 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 twice to that of the initial Remains the same Becomes 16 times to that of the initial Becomes four times to that of the initial 7. Which of the following is not a unit for power? Horsepower Joule – second Newton-meter per second Watt 8. Which one of the following is not the unit of energy? Kilowatt hour Kilowatt Joule Newton meter 9. 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. More than 100 J. Less than 100 J. 100 J. 10. When a light body collides with a massive body at rest _____ No reaction happens The massive body rebounds after the collision The light body rebounds after the collision The light body Remains at rest 11. If a force acts perpendicular to the direction of motion of a body, what is the amount of work done? Sinθ Constant Infinity Zero 12. Which of the following is an example of inelastic collision? Collision between two vehicles Collision between glass balls Collision between two railway compartments A bullet fired into a wooden block 13. An object with mass "m" kilograms is suspended "h" meters above the ground by a string. If the string is cut, what will the velocity of the object be at the instant it hits the ground? Two times ghm squared H-2gm One-half the mass squared The square root of 2gh 14. When a coolie walks on a horizontal platform with a load on his head, the work done by the coolie on the load is zero. True False 15. Two identical arrows, one with twice the speed of the other, are fired into a hay bale. The faster arrow will penetrate _____. More than four times as far as the slower arrow. The same distance as the slower arrow. Twice as far as the slower arrow. Four times as far as the slower arrow. 16. An object that has kinetic energy must be _____. Moving. Falling. At rest. At an elevated position. 17. For a collision to occur, the actual physical contact is necessary. True False 18. How many Joules of energy are in one kilowatt-hour? 3.6 megajoules 60 J 1 J 60 kilojoules 19. The type of energy possessed by a simple pendulum, when it is at the mean position is: Kinetic + Potential energy Potential energy Kinetic energy Sound energy 20. The kinetic energy of an object will increase the most if you _______________ Double the potential energy Double the temperature of the object Double the velocity of the object Double the mass of the object 21. 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}) 2514J 1960J 400J 250J 22. A person jumps to the ground from a platform 10 feet high. Which of the following is true? The person has less potential energy at the top of the platform than in the air. The person's kinetic energy at the instant they jump is approximately double their potential energy the instant they land. 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. 23. 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 Two times greater Four times greater 24. What happens to the total energy of a moving object if all the applied forces are conserved? It remains constant The velocity is required to answer this question It decreases It increases 25. A machine does 2500 J of work in 1 min. What is the power developed by the machine? 42 W 150 W 2500 W 21 W 1 out of 25 Time is Up! Time's up