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RUDIKE [14]
3 years ago
13

g Using the available equations in your lab manual , what is the acceleration of an object when it hits the ground if that objec

t is thrown from a building 100 meters above the ground, with an initial velocity of 10 meters per second (10M/S), and a flight time of 5 seconds (assume no friction)
Physics
1 answer:
qaws [65]3 years ago
7 0

Answer:

The acceleration of an object is 4 m/s².

Explanation:

The object is thrown from a building 100 meters above the ground, with an initial velocity of 10 meters per second and a flight time of 5 seconds.

It is required to find the acceleration of the object. Let a is the acceleration. Using second equation of kinematics to find it as :

h=ut+\dfrac{1}{2}at^2\\\\100=10(5)+\dfrac{1}{2}a(5)^2\\\\100=50+\dfrac{1}{2}\times 25a\\\\50=\dfrac{25a}{2}\\\\a=\dfrac{100}{25}=4\ m/s^2

So, the acceleration of an object is 4 m/s².

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When iron is exposed to moisture and oxygen it starts to rust.
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A major artery with a 1.7 cm2 cross-sectional area branches into 18 smaller arteries, each with an average cross-sectional area
Alex

Answer:

0.14

Explanation:

Flow rate is the volume flowing through a point at a particular time, in calcuing flow rate we have

Q= v*t

it in terms of Area, we have Q= A*v

Where A= area

v= velocity.

Solving the question , flow rate is constant then

A*v= constant

A(i) v(i)= A(f) v(f)

Where A(i)= initial area= 1.00cm^2

A(f)= final area= 0.400cm^2

V(i) and V(f) are the initial and final velocity respectively and the ratio of the two will gives us the factor

Substitute the values into the equation we have

1 V(i)= 4 V(f)

But we were told that the cross sectional area of 1.00cm^2 branches into 18 smaller arteries.

Then

1 V(i)=0.4 V(f)*(18)

1 V(i)=7.2V(f)

Then if we find the ratio of the velocity, we will get the factor.

V(f)/V(i)= 1/7.2

V(f)/V(i)=0.14

Hence, the factor of the average velocity of the blood reduced when it passes into these branches is 0.14

8 0
3 years ago
You push a piano 5 meters across the floor with a force of 400 n. how much work have you done?
kobusy [5.1K]
2,000 j(apex)

i hope this was right
3 0
4 years ago
Expand your answer for me plz.
daser333 [38]
 kinetic <span>energy when the pitcher has thrown it or when one of the other players has thrown the ball. The baseball also has </span>kinetic<span> energy when the batter hits the ball. when you catch the ball it is potential energy.</span>
5 0
3 years ago
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7. A Cyclist speeds up from 6.00 m/s to 9.70 m/s in a time of 1.40 seconds.
disa [49]

Answer:

2.64m/s

Explanation:

9.7m/s - 6m/s = 3.7

3.7 / 1.7 = 2.64

7 0
4 years ago
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