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Xelga [282]
4 years ago
13

A ball is dropped from rest from a Cliff and falls for 3 seconds.

Physics
1 answer:
trasher [3.6K]4 years ago
4 0

Answer:

-29.4 m/s

Explanation:

Given:

v₀ = 0 m/s

t = 3 s

a = -9.8 m/s²

Find: v

v = at + v₀

v = (-9.8 m/s²) (3 s) + (0 m/s)

v = -29.4 m/s

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Compare the time period of two simple pendulums of length 4m and 16m at a place.
Vlad1618 [11]

Answer:

the period of the 16 m pendulum is twice the period of the 4 m pendulum

Explanation:

Recall that the period (T) of a pendulum of length (L)  is defined as:

T=2\,\pi\,\sqrt{ \frac{L}{g} }

where "g" is the local acceleration of gravity.

SInce both pendulums are at the same place, "g" is the same for both, and when we compare the two periods, we get:

T_1=2\,\pi\,\sqrt{\frac{4}{g} } \\T_2=2\,\pi\,\sqrt{\frac{16}{g} } \\ \\\frac{T_2}{T_1} =\sqrt{\frac{16}{4} } =2

therefore the period of the 16 m pendulum is twice the period of the 4 m pendulum.

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3 years ago
Which diagram is the best model for a solid?<br> Substance A<br> Substance B<br> О Substance C
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Answer:

This link was diagram

Explanation:

https://doubtnut.app.link/FnsNC80Dccb

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3 years ago
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Molodets [167]

The chicken comes first

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Which of the following distances is the longest?a. 0.006 kilometers
zimovet [89]
820 meters is the longest

6 0
3 years ago
A particle is moving at a speed less than c / 2 . If the speed of the particle is doubled, what happens to its momentum?
Semenov [28]

If the speed of the particle is doubled. Then the value of the momentum also gets doubled.

<h3>What is momentum?</h3>

The sum of an entity's speed and mass is known as its linear momentum, translational momentum, or simply momentum in Newton's laws of motion. It has both a magnitude and a direction, making it a vector quantity. The SI unit of momentum is kg-m / s.

Let m be the mass and v be the velocity of an object. Then the momentum is given as,

P = mv   kg-m / s

A particle is moving at a speed less than c / 2. If the speed of the particle is doubled.

P = m(2v)

P = 2mv

If the particle's speed is twice. The momentum's value is then increased by two.

More about the momentum link is given below.

brainly.com/question/24030570

#SPJ1

3 0
2 years ago
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