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
amid [387]
3 years ago
12

the speed of a train is decreased in a uniform rate from 96 km/h to 48km/h through a distance of 800m. calculate the distance co

vered by the train from the moment of using the brakes till it stops if it was moving with the same acceleration​
Physics
1 answer:
GREYUIT [131]3 years ago
7 0

Answer:

1066.67 m

Explanation:

Given:

v₀ = 96 km/h = 26.67 m/s

v = 48 km/h = 13.33 m/s

Δx = 800 m

Find: a

v² = v₀² + 2aΔx

(13.33 m/s)² = (26.67 m/s)² + 2a (800 m)

a = -0.333 m/s²

Given:

v₀ = 26.67 m/s

v = 0 m/s

a = -0.333 m/s²

Find: Δx

v² = v₀² + 2aΔx

(0 m/s)² = (26.67 m/s)² + 2 (-0.333 m/s²) Δx

Δx = 1066.67 m

Round as needed.

You might be interested in
If you wanted to know the location of a vehicle that ran out of gas after taking a zigzag route through the city, which quantity
Papessa [141]

Explanation:

the vehicles displacement, since displacement deals with position

8 0
2 years ago
Which statement best defines an electric field?
stich3 [128]

Answer:

D

Explanation:

3 0
2 years ago
How many digits are in front of the decimal in scientific notation?
nikklg [1K]

Answer:

1

Explanation:

How many digits are in front of the decimal in scientific notation?

7 0
3 years ago
discuss the difference between molarity and molality, state the units of each, state the symbol of each, and give an example of
Afina-wow [57]
Molarity and molality both describe the concentration of a substance in terms of moles.
Molarity describes the number of moles of a substance per unit of volume, typically per liter (mol/l).
Molality describes the number of moles per unit of mass, typically kilograms (mol/kg). 
When determining the molality of a solution, mol/kg can be obtained by finding the number of moles in the substance, and dividing that number by the the total weight in kilograms of that substance.
When determining the molarity of a solution, mol/l can be obtained by dividing the number of moles in a substance by the total volume in liters of that substance. 
5 0
3 years ago
⦁ A car going 50 m/s is brought to rest in a distance of 20.0 m as it strikes a pile of dirt. How large an average force is exer
gtnhenbr [62]

Answer:

the average force exerted by seatbelts on the passenger is 5625 N.

Explanation:

Given;

initial velocity of the car, u = 50 m/s

distance traveled by the car, s = 20 m

final velocity of the after coming to rest, v = 0

mass of the passenger, m = 90 kg

Determine the acceleration of the car as it hit the pile of dirt;

v² = u² + 2as

0 = 50² + (2 x 20)a

0 = 2500 + 40a

40a = -2500

a = -2500/40

a = -62.5 m/s²

The deceleration of the car is 62.5 m/s²

The force exerted on the passenger by the backward action of the car is calculated as follows;

F = ma

F = 90 x 62.5

F = 5625 N

Therefore, the average force exerted by seatbelts on the passenger is 5625 N.

8 0
3 years ago
Other questions:
  • The light bulb transfers electrical energy into light. What is one type of energy that is also generated that is NOT a desired e
    11·2 answers
  • What brings greater concentration of dissolved nutrients to ocean surface
    6·2 answers
  • A medical ultrasound imaging system sends out a steady stream of very short pulses. To simplify analysis, the reflection of one
    7·1 answer
  • To measure specific heat, the student flows air with a velocity of 20 m/s and a temperature of 25C perpendicular to the length
    14·1 answer
  • Is it possible to add three vectors of equal magnitude but a different direction to get a null vector?
    13·1 answer
  • A hypothesis is _______.
    9·1 answer
  • Which of these experiments would make use of qualitative data?
    7·1 answer
  • Help please<br> It’s kinda urgent
    10·1 answer
  • Un vehículo parte del reposo y acelera constantemente a 6 m/s2
    9·1 answer
  • 9. What is the volume of an object that has a mass of 15.0 grams and a density of 1.4 g/mL?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!