Artículos de esta sección

• Types of forces: at a distance or through contact (4841)

  4 de febrero de 2020, por F_y_Q

  Indicate which of these phenomena are produced by forces at a distance and which are produced by forces through contact:
  a) The motion of a train due to magnetic levitation.
  b) The deformation of a spring when a weight is attached to it.
  c) The skidding of a car on a pool of water.
  d) (…)

• Classification of bodies: rigid, elastic or plastic (4842)

  11 de noviembre de 2019, por F_y_Q

  Classify the following objects into rigid, plastic or elastic bodies:
  a) The mechanism of a key on the computer keyboard.
  b) Sunglasses.
  c) A headband.
  d) A steel fork.
  e) The bristles of a toothbrush.
  f) Bread dough.

• Convertion of units: speed of a car (3600)

  8 de junio de 2016, por F_y_Q

  A car is moving in a straight path, covering 3 600 meters in 90 seconds. Determine the speed of the car, expressed in km/h.

• Acceleration of a car (3583)

  22 de mayo de 2016, por F_y_Q

  A car is increasing its speed from 40 m/s to 70 m/s. What is its acceleration if the time needed was 3 seconds?

• Time taken to cover a distance by car (3567)

  6 de mayo de 2016, por F_y_Q

  If the speed of a car is 75 km/h. How long does it take the car to cover a distance of 75 km?