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kvv77 [185]
3 years ago
9

In the absence of air resistance, a ball is thrown vertically upward with a certain initial KE. When air resistane is a factor a

ffecting the ball, does it return to its original level with the same, less or more KE? Does your answer contradict the law of energy of conservation?
Physics
1 answer:
Ber [7]3 years ago
4 0

Answer:

Explanation:

A ball is thrown vertically upward with a certain Kinetic Energy in the absence of air resistance and while returning it experiences air resistance.

Air resistance causes the ball to lose its kinetic energy as it provides resistance which will convert some of its kinetic energy to heat energy.

So in a way total energy is conserved but not kinetic energy as some portion of it is lost in the form of heat.              

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Answer:

8.7

Explanation:

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Rosa uses the formula (vi¡cosθ)tΔ to do a calculation. Which value is Rosa most likely trying to find?
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3 years ago
In a fluid-filled container why is the pressure greater at the base of the container
miss Akunina [59]
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8 0
3 years ago
Read 2 more answers
2. wnich meaning of a word refers to exactly what it is?
kondaur [170]

Answer:

2) Denotative meaning of a word or Denotation.

3) Connotative meaning of a word or Connotation.

4) Ethics and Culture.

Explanation:

2) Which meaning of a word refers to exactly what it is?

The denotative meaning of a word represents the explicit or the exact meaning of that word. Also called the denotation of the word.

3) Which meaning of a word includes what the word may represent?

The Connotative meaningof a word means something suggested or implied by a word. Also called the Connotation of the word.

4) What is the term used for society's tried and true rules that guide life?

Ethics refer to the rules and standards that guide the conduct of individuals; especially members of a societal body.

Culture is the total way of life of a society.

Hence, ethics amd culture both serve as the society's tried and tested rules that guide life.

Hope this Helps!!!

7 0
3 years ago
At the instant the traffic light turns green, an automobile that has been waiting at an intersection starts ahead with a constan
oksian1 [2.3K]

Answer:

(A) Distance taken by automobile to overtake truck is 175.23 m

(B) Final speed of the automobile is 29.6 m/s.

Explanation:

According to the problem, the automobile is at rest, so its initial speed is zero and the automobile is moving with constant acceleration.

The general equation of motion is:

d = ut + 0.5at²      .....(1)

Here d is distance, a is acceleration, t is time and u is initial speed.

The distance (d₁) travel by the automobile after green light in time t is given by the relation :

d₁ = u₁t + 0.5at²

We know that its initial velocity is zero i.e. u = 0 m/s.

d₁ = 0.5at²      ......(2)

The truck is moving with constant speed, so its acceleration is zero. Therefore, the distance covered by the truck using equation (1) is;

d₂ = u₂t         .......(3)

Since, the distance travelled by automobile and truck are same. Hence,

d₁ = d₂

0.5at² = u₂t

t = 2u₂/a

Substitute 14.8 m/s for u₂ and 2.50 m/s² for a in the above equation.

t = \frac{2\times14.8}{2.50}

t = 11.84 s

(A) Distance travelled by automobile, d = u₂t =14.8 x 11.84 = 175.23 m

(B) Final speed of the automobile is given by the relation:

v = u + at

v = 0 + 2.50 x 11.84

v = 29.6 m/s

4 0
3 years ago
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