physics

posted by .

The rate of energy use in a typical house is about 2.0 kW (2.0 × 103
W). If the kinetic
energy of a 1400-kg car is equal to the total energy used by the house in 1 min, what is
the car’s speed?

  • physics -

    Pt =E =mv²/2
    v=sqrt(2Pt/m) =
    =sqrt{2•2000•60/1400)=
    =13.09 m/s

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics-energy conservation

    when you apply the brakes of a car its kinetic energy or energy of motion decreases. a)to what form of energy is the kinetic energy converted?
  2. physics.

    A flywheel is a solid disk that rotates about an axis that is perpendicular to the disk at its center. Rotating flywheels provide a means for storing energy in the form of rotational kinetic energy and are being considered as a possible …
  3. physics

    How do i find this? A shooting star is a meteor that burns up when it reaches Earth's atmosphere. Many of these meteoroids are quite small. Calculate the kinetic energy of a meteoroid of mass 6.0 g moving at a speed of 45 km/s and
  4. Physics

    Two objects are mocing about so that their total momentum is zero. What can be said about their kinetic energy?
  5. physics

    An experimental flywheel, used to store energy and replace an automobile engine, is a solid disk of mass 202.0 kg and radius 0.35 m. (a) What is its rotational inertia?
  6. Physics ~please help me!

    1.) A car (m=1200 kg) moves form 2.0 m/s to 15.0 m/s in 100 m. a) What is the initial kinetic energy of the car?
  7. Science

    I really need help in Science. Right now in science we are doing renewable energy. For the assignment we have two choices, a house or car of the future, I decided to do a house. The question is, "How could renewable energy sources …
  8. Science

    Problem How could renewable energy sources be used in a house?
  9. physics

    A flywheel is a solid disk that rotates about an axis that is perpendicular to the disk at its center. Rotating flywheels provide a means for storing energy in the form of rotational kinetic energy and are being considered as a possible …
  10. science

    how should each form of energy be identified?

More Similar Questions