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Aleonysh [2.5K]
3 years ago
7

The acceleration of an object as a function of time is given by a(t) = (1.00 m/s2)t2. If displacement of the object between time

and time t = 2.00 s is 15.0 m, what is the velocity of the object at time t = 0.00 s?
a-13.5 m/s
b-Not enough information is given to determine the velocity of the object at time t = 0.00 s.
c-6.25 m/s
d-3.75 m/s
1.25 m/s
Physics
1 answer:
jolli1 [7]3 years ago
3 0

not enough information is given to determine the velocity of the object at time to=0.00s

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A 20 kg box has 1000 joules of potential energy on a shelf. How high is the shelf?
navik [9.2K]
Formula: PE = mgh
m = 20 kg, g = 9.8 m/s^2 h= ?
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1000 = 196h
h = 5.10204082
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The most important barriers to diffusion today are physical features of Earth's surface.
nikdorinn [45]

Answer:

False

Explanation:

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List five rules of golf etiquette. Explain the correct stance, grip, orientation, and parts of a swing.
Verizon [17]
- keep you eyes on the ball, after you hit the ball you look up, you have to see the club hit the ball

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8 0
3 years ago
Read 2 more answers
A diver springs upward from a board that is 4.40 m above the water. At the instant she contacts the water her speed is 13.5 m/s
Yakvenalex [24]

The diver has the initial velocity, both (a) magnitude is 9.8 m/s and (b) direction is  73.5°.

<h3>What is free falling?</h3>

When an object is released from rest in free air considering no friction, the motion is depend only on the acceleration due to gravity, g.

If we drop an object of mass m near the Earth surface from a height h, it has initial mechanical energy(P.E)

U =mgh

When the object strikes the ground, all the potential energy converted into kinetic energy.

K.E = 1/2mv²

where v is the speed just before hitting the ground.

A diver springs upward from a board that is 4.40 m above the water. At the instant, she contacts the water her speed is 13.5 m/s and her body makes an angle of 78.1 ° with respect to the horizontal surface of the water.

(a)

From energy conservation principle, initial and final mechanical energy are equal.

1/2mu² + mgh = 1/2mv²

where, u is the initial velocity of the diver.

u = sq rt  (v² - 2gh)

u = sq rt (13.5² - 2x9.81x4.4)

u = 9.798 m/s or 9.8 m/s

Thus, the velocity of the diver is 9.8 m/s.

(b)

The horizontal component of velocity will remain constant.

The horizontal component of acceleration is zero.

Then,

ucosθ = vcosΦ

θ = cos⁻¹ [ (13.5 x cos 78.1)/9.8 ]

θ = 73.5°

Thus, the direction of velocity is  73.5°.

Learn more about free falling.

brainly.com/question/13299152

#SPJ1

5 0
2 years ago
What is the mass of an object that is hanging 12.6 m above the surface of the earth and has a
satela [25.4K]

Answer:

22.05 Kg

Explanation:

Apply the formula:

GPE = Gravity . Mass . ΔHigh

2778.3 = 10 . Mass . 12.6

2778.3 = 126 . Mass

Mass = 2778.3/126

Mass = 22.05

7 0
3 years ago
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