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MA_775_DIABLO [31]
2 years ago
13

What would the acceleration of a car be from a stoplight if it started at 0 m/s and reached a

Physics
1 answer:
trapecia [35]2 years ago
3 0

Answer:

The acceleration of a car would be:  a=12.8 m/s²

Explanation:

Given

Initial velocity = v_1=0 m/s

Final velocity = v_f=100 m/s

Time elapsed = t = 7.8 s

To determine

We need to determine the acceleration of a car.

We know that acceleration is basically the rate of change in velocity over time.

Thus,

We can determine the acceleration using the formula

\:\:\:a=\:\frac{v_f-v_i}{t}

where

  • a is the acceleration
  • v_1 is the initial velocity
  • v_f is the final velocity
  • t is time elapsed

now substituting the values v_1=0,  v_f=100, and t = 7.8 in the formula

\:\:\:a=\:\frac{v_f-v_i}{t}

a=\:\frac{100-0}{7.8}

a=\frac{100}{7.8}

a=12.8 m/s²

Therefore, the acceleration of a car would be:  a=12.8 m/s²

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2. A pebble is dropped down a well and hits the water 1.5 s later. Using the equations for motion with constant acceleration, de
kow [346]

Answer:

S = 11.025 m

Explanation:

Given,

The time taken by the pebble to hit the water surface is, t = 1.5 s

Acceleration due to gravity, g = 9.8 m/s²

Using the II equations of motion

                          S = ut + 1/2 gt²

Here u is the initial velocity of the pebble. Since it is free-fall, the initial velocity

                                u = 0

Therefore, the equation becomes

                            S = 1/2 gt²

Substituting the given values in the above equation

                              S = 0.5 x 9.8 x 1.5²

                                 = 11.025 m

Hence, the distance from the edge of the well to the water's surface is, S = 11.025 m

3 0
3 years ago
When only several competitors in an industry maintain most of the sales of those items, it is considered a(n) Industry of Social
Alexeev081 [22]

Answer:

Oligopoly

Explanation:

An oligopoly is the structure of the market that is characterized by the domination of a few firms or industries. Other small firms also operate in the same market, but the power concentration is associated with few firms only. Interdependency among the firms helps in planning and strategy making to introduce new ideas to increase the market activities. The competition in the market is reduced when a few of the firms dominate the market. It results in an increase in the price of commodities.

8 0
3 years ago
Whitch two options are forms of kinetic energy?
valentina_108 [34]

Answer:the witch has nothing to do with the problem

Explanation:

7 0
2 years ago
¿ cuales son las especies q mas características tienes en común ?
Katena32 [7]
De los reptiles, anfibios; pájaros, peces; mamíferos y artrópodos, los que más se asemejan en características son los pájaros y los mamíferos porque ambos son de sangre caliente y no varia independientemente de en qué ambiente se encuentre
5 0
2 years ago
Vector ~A has a magnitude of 29 units and points in the positive y-direction. When vector ~B is added to ~A, the resultant vecto
timurjin [86]

Answer:

The magnitude of vector B is 43 units and it points in the negative y-direction.

Explanation:

Resultant of vectors = vector sum of all the vectors

Vector A = 29j

Vector B = ?

Resultant of vector A and B = R = -14j

R = A + B

-14j = 29j + B

B = -14j - 29j = - 43j

Hence, the magnitude of vector B is 43 units and it points in the negative y-direction.

4 0
2 years ago
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