1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
RideAnS [48]
3 years ago
12

What distance will be traveled if you are going 120km/hr for 0.75 hr?

Physics
1 answer:
SVEN [57.7K]3 years ago
5 0

Answer:

60 km

Explanation:

For an object (or a person, such as in this case) moving at constant speed, the speed is equal to the ratio between the distance travelled and the time taken:

where

v is the speed

d is the distance

t is the time taken

In this case, we have:

v = 120 km/h is the speed

t = 30 min = 0.5 h is the time taken

Therefore, we can rearrange the equation to find the total distance travelled:

You might be interested in
4.- Una vagoneta de 1000 kg de peso parte del reposo en el punto 1 y desciende, sin rozamiento, por la vía indicada en la figura
Akimi4 [234]

Answer:

A) 49,050 N

B) 16 m

Explanation:

Question:

El dibujo de la pregunta se obtiene de un documento titulado "TRABAJO DIVERSO Y ENERGÍA" que se encuentra en línea y se presenta aquí.

La masa dada del vagón, m = 1,000 kg

La altura del punto en el que descansa el vagón, punto 1, h₁ = 12 m

A) El radio en el punto 2, el punto más bajo, R = 6 m

La fuerza, 'N', que la vía ejerce sobre el vagón en el punto 1 viene dada por la siguiente relación;

N = El peso del vagón + La fuerza de movimiento del vagón

∴ N = m × g + m × a

Dónde;

g = La aceleración debida a la gravedad ≈ 9,81 m / s²

a = La aceleración del vagón

Observamos que para el movimiento circular, la fuerza de movimiento del vagón, m × a = La fuerza centrípeta que actúa sobre el vagón = m × v² / R

∴ m × a = m × v² / R

Dónde;

v² = La velocidad del vagón en el punto 2 = 2 · g · h₁

Por lo tanto;

N = m × g + m × a = m × g + m × v² / R = m × g + m × 2 · g · h₁ / R

∴ N = 1000 × 9,81 + 1000 × 2 × 9,81 × 12/6 = 49,050

La fuerza que ejerce el vagón en el punto 2, N = 49,050 N

B) En el punto 3, tenemos;

N = m · g - m · a₃

La fuerza centrípeta en el punto 3, m · a₃ = m · v₃² / R₃

∴ La altura en el punto 3, h₃ = 4 m

El cuadrado de la velocidad en el punto 3, v₃² = 2 · g · (h₁ - h₃)

Para que el vagón esté seguro en el punto 3, la fuerza de la vía sobre el vagón, N = 0 para que el vagón permanezca en la vía actuando

Por lo tanto;

N = m · g - m · a₃ = 0

m · g = m · a₃ = m · v₃² / R₃ = m · (2 ​​· g · (h₁ - h₃)) / R₃

∴ R₃ = (2 · g · (h₁ - h₃)) / g = (2 · (h₁ - h₃)) = 2 × (12 - 4) = 16

El radio de curvatura en el punto 3 para que el punto sea seguro es R₃ = 16 m.

5 0
3 years ago
How does increasing the distance between charged objects affect the electric force between them?
bazaltina [42]
The best option would be C.
8 0
3 years ago
Help ASAP! Giving brainliest!!!
PilotLPTM [1.2K]
<h3><u>Answer and explanation;</u></h3>

Reflection;

  • Bounces back from an opaque material
  • Bounces back from the boundary of two mediums
  • Seen in mirrors

Refraction;

  • Passes through a prism  
  • Moves from one medium to another  
  • Seen in lenses

Reflection refers to the bouncing of waves such as light waves. It involves a change in direction of waves when they bounce off a barrier.

Refraction is the bending of waves when they move from one medium to another. It involves a change in the direction of waves as they pass from one medium to another.

8 0
2 years ago
Read 2 more answers
When an explanation to a problem is accepted as always true, it is
Vaselesa [24]
I believe the best answer is law, as scientific laws are accepted to be true under the proper conditions. 
8 0
3 years ago
Read 2 more answers
Which item could you use in place of an ammeter to demonstrate that a
love history [14]

Answer:

the answer is D

Explanation:

6 0
2 years ago
Other questions:
  • Which of the following best describes a capacitor
    14·2 answers
  • At a certain location, Earth has a magnetic field of 0.60 â 10â4 T, pointing 75° below the horizontal in a north-south plane. A
    10·1 answer
  • A runner runs a 1,500 m race on a circular track. The runner stops 100 m from the starting point. What are the distance and disp
    11·1 answer
  • A coefficient in a chemical formula shows the number of electrons?<br><br> True<br> False
    15·2 answers
  • Anna will wear a black dress when she attends her cousin’s wedding. Which color(s) does the dress absorb?
    8·2 answers
  • An archer fires an arrow, which produces a muffled "thwok" as it hits a target. If the archer hears the "thwok" exactly 1 s afte
    10·1 answer
  • Which gland controls the workings of other endocrine glands? Thyroid, pituitary, adrenal, or thymus
    14·2 answers
  • Question 5 (2 points)
    11·2 answers
  • Suppose two children push horizontally, but in exactly opposite directions, on a third child in a wagon. The first child exerts
    10·1 answer
  • An object with mass of 4kg is thrown with initial velocity of 20m/s from point A and follows the track of ABCD.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!