16/12/2019Work, Energy and Power (STUDY BY TOPICS JUNIOR CLASS) 0Comments by Gate Academy Welcome to your Work, Energy and Power (STUDY BY TOPICS JUNIOR CLASS) NAME EMAIL PHONE NUMBER 1. [ Junior school science (physics) ]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? The square root of 2gh H-2gm Two times ghm squared One-half the mass squared2. [ Junior school science (physics) ]In order for a circuit to work, the path must be _________. Open Closed Paralled Series3. [ Junior school science (physics) ]The formula of potential energy is mg mgh fscost scos t4. [ Junior school science (physics) ]When a bullet is fired from a rifle, the force on the rifle is equal to the force on the bullet. However, the energy of the bullet is greater than the energy of the recoiling rifle because the _______. The impulse of the bullet is more Force on the bullet acts for a longer time Force on the bullet acts for a longer distance Bullet's momentum is greater than that of the rifle5. [ Junior school science (physics) ]The kinetic energy of an object will increase the most if you _______ Double the velocity of the object Double the potential energy Double the temperature of the object Double the mass of the object6. [ Junior school science (physics) ]Example of renewable energy include the following except Sun Water Wind Natural Gas7. [ Junior school science (physics) ]There are how many types of force 1 4 3 28. [ Junior school science (physics) ]Which of the following is NOT a good insulator? Glass Iron Plastic All of the above9. [ Junior school science (physics) ]A drawing that uses symbols to show how the parts of an electric circuit are connected is a/an ______________ Nichrome wire Circuit diagram Electric diagram Parallel circuit10. [ Junior school science (physics) ]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 speed is constant. The object's Kinetic Energy is decreasing. The object's Kinetic Energy is constant.11. [ Junior school science (physics) ]If an object has kinetic energy, then it also must have _____. Force Acceleration Impulse Speed12. [ Junior school science (physics) ]A person jumps to the ground from a platform 10 feet high. Which of the following is true? 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. 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.13. [ Junior school science (physics) ]Electric current in a/an _____________________ circuit travels in ONE path Electric Wire Parallel Series14. [ Junior school science (physics) ]If you push on a wall with a force of 30 N, then _____ The wall moves back 3 cm. The wall pushes on you with a force of 30 N. The wall cannot be forced. You are pulled towards the wall.15. [ Junior school science (physics) ]Electric current in a/an ____________________ circuit travels in MORE THAN ONE path. Connected Parallel Series Wire16. [ Junior school science (physics) ]Kinetic energy is energy of a body due to its length position motion distance17. [ Junior school science (physics) ]There are how many types of mechanical energy 3 1 4 218. [ Junior school science (physics) ]What work is done when a mass of 5kg is raised through a vertical height of 25m (take g=10m/s²) 12500J 1250J 12.5J 125J19. [ Junior school science (physics) ]"Power" is defined as ________ The rate at which work is done The sum of potential and kinetic energy The energy necessary to do work The velocity of an object squared20. [ Junior school science (physics) ]The SI unit of time is hours seconds days minutes21 out of 20Time is Up!
