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3 years ago

What did Isaac Newton’s investigation if the gravity explain ?

Physics

1 answer:

Ludmilka [50]3 years ago

4 0

Answer:

Gravity acts on all objects in the universe.

Explanation:

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Does anyone know this?

Radda [10]

Answer:

999990900

Explanation:

lololo

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3 years ago

Which statement places events during the Space Race in the correct order from the earliest to the most recent?

leva [86]

Answer:

3,1,4,2

Explanation:

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3 years ago

Read 2 more answers

A tennis ball is dropped from 1.16 m above the

sweet-ann [11.9K]

Answer:

Vf = 4.77 m/s

Explanation:

During the downward motion we can easily find the final velocity or the velocity with which the ball hits the ground, by using third equation of motion. The third equation of motion is given as follows:

2gh = Vf² - Vi²

where,

g = acceleration due to gravity = 9.8 m/s²

h = height = 1.16 m

Vf = Final Velocity of Ball = ?

Vi = Initial Velocity of Ball = 0 m/s (Since, ball was initially at rest)

Therefore, using these values in the equation, we get:

(2)(9.8 m/s²)(1.16 m) = Vf² - (0 m/s)²

Vf = √(22.736 m²/s²)

6 0

3 years ago

Acceleration on moon is approximately 1/6th of the Earth's; what would be the force of your egg drop package if dropped on the m

cricket20 [7]

Acceleration on earth=10m/s^2

Acceleration on moon:-

$\\ \rm\Rrightarrow 10\dfrac{1}{6}=1.6m/s^2$

Now

Mass=0.56kg

$\\ \rm\Rrightarrow F=ma$

$\\ \rm\Rrightarrow F=0.56(1.6)$

$\\ \rm\Rrightarrow F=0.896N$

8 0

3 years ago

How fast must a 2.70-g ping-pong ball move in order to have the same kinetic energy as a 145-g baseball moving at 31.0 m/s

Helen [10]

Answer:

227 m/s

Explanation:

Kinetic energy formula:

$\displaystyle \text{KE} = \frac{1}{2} mv^2$

where m = mass of the object (kg)
and v = speed of the object (m/s)

Let's find the kinetic energy of the 145-g baseball moving at 31.0 m/s.

First convert the mass to kilograms:

145-g → 0.145 kg

Plug known values into the KE formula.

$\displaystyle \text{KE} = \frac{1}{2} (.145)(31.0)^2$
$\displaystyle \text{KE} = 69.6725 \ \text{J}$

Now we want to find how fast a 2.70-g ping pong ball must move in order to achieve a kinetic energy of 69.6725 J.

First convert the mass to kilograms:

2.70-g → 0.00270 kg

Plug known values into the KE formula.

$\displaystyle 69.6725 = \frac{1}{2} (.00270)v^2$
$\displaystyle \frac{2(69.6725)}{.00270} =v^2$
$57609.25926=v^2$
$v=227.1767137$

The ping-pong ball must move at a speed of 227 m/s to achieve the same kinetic energy as the baseball.

4 0

3 years ago