Power problem 1

Which statements are correct?

  • The acceleration of a car is determined by measuring the time it takes for the car to accelerate from 0 to 100 . The more powerful the engine is, the more time the car needs to accelerate.

  • If we want to shorten the time of doing the work, we must do the work with more power.

  • Two machines worked for one hour. If the first machine did more work during this time than the second, then, the first machine worked with more power.

  • A machine that works at a higher power always does more work than one that works at a lower power.

  • If two locomotives pull wagons with the same amount of force, the locomotive with higher power will have a higher speed.

  • An elevator with more power can lift a heavier load.


material editor: Gabriel Amakhabi