EjerciciosFyQ

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

F_y_Q — 2020-02-04T06:23:54Z

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) The formation of the aurora borealis.
e) The motion of a cupboard when pushed.

- Forces and their effects / RESUELTO, INGLÉS, Bilingüismo

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

F_y_Q — 2019-11-11T18:42:02Z

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.

- Forces and their effects / RESUELTO, INGLÉS, Bilingüismo

Convertion of units: speed of a car (3600)

F_y_Q — 2016-06-08T07:06:40Z

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.

We are going to use the velocity equation and two conversion factors:

Acceleration of a car (3583)

F_y_Q — 2016-05-22T06:35:14Z

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?

Acceleration is defined by:

Replace the problem data:

Descarga el enunciado y la resolución del problema en formato EDICO si lo necesitas.

Time taken to cover a distance by car (3567)

F_y_Q — 2016-05-06T04:55:51Z

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

Using the definition of speed:

Rearranging the formula to solve for time:

Substituting the given values:

Descarga el enunciado y la resolución del problema en formato EDICO si lo necesitas.

Time it takes for blood to cover 30 cm distance (3494)

F_y_Q — 2016-02-23T05:08:46Z

The speed of blood flow is 30 cm/s. Considering a vein as a straight path, how long will it take for blood to cover a distance of 30 cm?

Speed is the quotient between distance and time. To find the time, you use the fomula:

Descarga el enunciado y la resolución del problema en formato EDICO si lo necesitas.

Time it takes for sunlight to reach the Earth (3165)

F_y_Q — 2015-05-21T05:56:31Z

There are 150 000 000 km between the Sun and the Earth. If the velocity of light in a vacuum is 300 000 km/s, how long does it take for light to reach the Earth?

Clearing time in the velocity equation (being c the speed of light):

Now is time to solve the equation:

Descarga el enunciado y la resolución del problema en formato EDICO si lo necesitas.