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2 years ago

What does this picture show?

Physics

1 answer:

gogolik [260]2 years ago

3 0

Answer:

d poor accuracy,poor precision

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Ball is dropped from the height H the total distance covered in last second of its motion is equal to distance covered in first

Alik [6]

$\rm{\gray{\underline{\underline{\blue{GIVEN:-}}}}}$

A ball is dropped from a height = H

The total distance covered in last second of its motion is equal to the distance covered in first 3 second .

$\rm{\gray{\underline{\underline{\blue{TO\:FIND:-}}}}}$

The height of the journey .

$\rm{\gray{\underline{\underline{\blue{SOLUTION:-}}}}}$

We have know that,

$\green\bigstar\:\rm{\gray{\overbrace{\underbrace{\red{S\:=\:ut\:+\:\dfrac{1}{2}\:at^2\:}}}}}$

Where,

S = Distance .

u = initial velocity = 0m/s

t = time = 3s

a = acceleration

[Note :- Here, acceleration is ‛acceleration due to gravity’ .]

a = 10m/s^2

=> S = 1/2 × 10 × (3)^2

=> S = 5 × 9

=> S = 45m -----(1)

✒ If the ball takes ‛n’ second to fall the ground, then distance covered in nth second is,

$\green\bigstar\:\rm{\gray{\overbrace{\underbrace{\red{S_n\:=\:u\:+\:\dfrac{g}{2}\:(2n\:-\:1)\:}}}}}$

=> Sn = 0 + 10/2 (2 × n - 1)

=> Sn = 5 (2n - 1)

=> Sn = 10n - 5 -----(2)

Therefore,

10n - 5 = 45

=> 10n = 45 + 5

=> n = 50/10

=> n = 5

Now put the value of ‛n = 5’ in equation(2), we get

=> Sn = 10 × 5 - 5

=> Sn = 50 - 5

=> Sn = 45m

$\rm{\pink{\therefore}}$ The height of the journey is “ 45m ” .

7 0

3 years ago

A lens uses what process to deflect light rays passing through it? a. reflection b. refraction c. absorption d. transparency

USPshnik [31]

A lens uses the process of refraction to deflect light rays from passing through it.

8 0

3 years ago

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Please help which one is correct

Natalija [7]

Answer:

option (i) is correct

Explanation:

as there is no air resistance, no force is acting on the object horizontally, but gravitational acceleration will obviously act, regardless of the air resistance... option (i) is correct

8 0

3 years ago

Write a main idea statement about the nervous system.

Alisiya [41]

Answer:

The nervous system is the major controlling, regulatory, and communicating system in the body. It is the center of all mental activity including thought, learning, and memory. Together with the endocrine system, the nervous system is responsible for regulating and maintaining homeostasis.

Explanation:

6 0

2 years ago

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Find the final velocity

Verizon [17]

Answer: v = 4.4 m/s

Explanation:

In the absence of friction, the total mechanical energy will be constant

KE₀ + PE₀ = KE₁ + PE₁

0 + mg(6) = ½mv₁² + mg(5)

½mv₁² = mg(6 - 5)

v = √(2g(1)) = 4.4 m/s

3 0

2 years ago