Welcome to your Work, Energy and Power (STUDY BY TOPICS JUNIOR CLASS) NAME EMAIL PHONE NUMBER 1. [ Junior school science (physics) ]An object that has kinetic energy must be ____Falling.At an elevated position.At rest.Moving.2. [ Junior school science (physics) ]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 ______.Four times as muchLess.The sameTwice as much.3. [ Junior school science (physics) ]There are how many types of force31424. [ Junior school science (physics) ]The SI unit of time isminutesdayssecondshours5. [ Junior school science (physics) ]Which of the following is not a unit for power?Joule – secondHorsepowerNewton-meter per secondWatt6. [ Junior school science (physics) ]A person jumps to the ground from a platform 10 feet high. Which of the following is true?The person's potential energy at the instant they jump is approximately equal to their kinetic energy the instant they land.The person has less potential energy at the top of the platform than in the air.The person has more kinetic energy before they jump than after they jump.The person's kinetic energy at the instant they jump is approximately double their potential energy the instant they land.7. [ Junior school science (physics) ]A material through which electric current CANNOT pass easily is a/an ____________TesterInsulatorReceptorConductor8. [ Junior school science (physics) ]Two identical arrows, one with twice the speed of the other, are fired into a hay bale. The faster arrow will penetrate _____.The same distance as the slower arrow.More than four times as far as the slower arrow.Twice as far as the slower arrow.Four times as far as the slower arrow.9. [ Junior school science (physics) ]"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 done10. [ Junior school science (physics) ]If you push on a wall with a force of 30 N, then _____The wall pushes on you with a force of 30 N.The wall cannot be forced.You are pulled towards the wall.The wall moves back 3 cm.11. [ Junior school science (physics) ]The SI unit of forceAmpereFaradNewtonMetre12. [ Junior school science (physics) ]The potential energy of an object is equal to _______The work done on the object to put the object into its current state.The force of gravity working on the object.The size of the object compared to its surface area.The velocity of the object divided by its mass.13. [ Junior school science (physics) ]Strictly speaking, a car will burn more gasoline if the car radio is turned on. This statement is ____Always true.True only if the car's engine is running.Totally false.True only if the car's engine is stopped.14. [ Junior school science (physics) ]There are how many types of mechanical energy231415. [ Junior school science (physics) ]The following are examples of contact force exceptPushGravityTensionFriction16. [ Junior school science (physics) ]As an object goes up a hill at constant velocity, which of the following is NOT true?The object's Kinetic Energy is decreasing.The object's Kinetic Energy is constant.The object's Potential Energy is increasing.The object's speed is constant.17. [ Junior school science (physics) ]Which of the following is NOT a good insulator?GlassPlasticIronAll of the above18. [ Junior school science (physics) ]If an object has kinetic energy, then it also must have _____. SpeedForceAccelerationImpulse19. [ Junior school science (physics) ]How many Joules of energy are in one kilowatt-hour?60 J60 kilojoules1 J3.6 megajoules20. [ Junior school science (physics) ]Electric current in a/an _____________________ circuit travels in ONE pathSeriesParallelWireElectric21 out of 20Time is Up!
