Welcome to your Energy, Work and Power(Senior Class Physics Study by Topics) NAME EMAIL PHONE NUMBER 1. 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.Four times as far as the slower arrow.The same distance as the slower arrow.Twice as far as the slower arrow.2. 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 _____.100 J.More than 100 J.Less than 100 J.Not enough information given.3. When a massive body collides against a light body at rest ____The light body reboundsThe velocity of the bodies get exchangedThe massive body comes to restThe light body starts moving4. A man of mass 50 kg jumps to a height of 1 m. His potential energy at the highest point is (g = 10 m/s2):500 J50 J5000 J5 J5. 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 ______.Less.Twice as much.The sameFour times as much6. 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?50J150J100J200J7. The potential energy of an object is equal to ________The force of gravity working on the object.The work done on the object to put the object into its current state.The size of the object compared to its surface area.The velocity of the object divided by its mass.8. As an object goes up a hill at constant velocity, which of the following is NOT true?The object's Potential Energy is increasing.The object's Kinetic Energy is decreasing.The object's speed is constant.The object's Kinetic Energy is constant.9. Collision between two carom coins is an example for ____Inelastic collisionPerfectly inelastic collisionElastic collisionOblique collision10. If you have to push a car forward, what are the forces acting on you?No forces act on you.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.Your own muscles push you down.11. The momentum of a bullet of mass 20 g fired from a gun is 10 kg.m/s. The kinetic energy of this bullet in kJ will be:52.5250.2512. A motorbike engine can develop a power of 90000 W in order to keep a constant velocity of 30 m/s. What is the pushing force?30 N300 N30000 N3000 N13. For a collision to occur, the actual physical contact is necessary.TrueFalse14. A block with a mass of m crosses a rough horizontal surface at a constant speed of v. The coefficient of kinetic friction between the block and the surface isµ. How much power must be produced in order to overcome the friction force?µgµmgmgµmgv15. How much mass is converted into energy per day in Tarapur nuclear power plant operated at 107 kW?9.6g2g9g10g16. For a body moving in a circular path, the work done by the centripetal force is ________PositiveConstantNegativeZero17. A bullet fired from a gun can pierce a target due to its ___________Mechanical energyHeat energyAccelerationKinetic energy18. Which of the following is not a unit for power?HorsepowerNewton-meter per secondJoule – secondWatt19. When a light body collides with a massive body at rest _____The massive body rebounds after the collisionNo reaction happensThe light body rebounds after the collisionThe light body Remains at rest20. When a body slides against a rough horizontal surface, the work done by friction is _____PositiveZeroConstantNegative21. Two identical arrows, one with twice the kinetic energy of the other, are fired into a hay bale. The faster arrow will penetrate _____.The same distance as the slower arrow.Twice as far as the slower arrow.More than four times as far as the slower arrow.Four times as far as the slower arrow.22. A moving hammer drives a nail into the wood. It has kinetic energy.FalseTrue23. If a force acts perpendicular to the direction of motion of a body, what is the amount of work done?ConstantZeroInfinitySinθ24. "Power" is defined as ________The sum of potential and kinetic energyThe velocity of an object squaredThe energy necessary to do workThe rate at which work is done25. 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?6000 W600 W60 W60000 W26 out of 25Time is Up!
