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Brut [27]
3 years ago
5

An object is thrown with a horizontal velocity of 20 m/s from a cliff that is 125 m above level ground. If air resistance is neg

ligible, the time that it takes the object to fall to the ground from the cliff is most nearly
Physics
1 answer:
Serjik [45]3 years ago
5 0

Given that,

Horizontal velocity of the object, v = 20 m/s

Height of the cliff, h = 125 m

We need to find the time that it takes the object to fall to the ground from the cliff is most nearly. It can be calculated using second equation of motion. Let us consider that the initial speed of the object is 0. So,

h=ut+\dfrac{1}{2}at^2

Here, a = g and u = 0

h=\dfrac{1}{2}at^2\\\\t=\sqrt{\dfrac{2h}{g}} \\\\t=\sqrt{\dfrac{2\times 125}{10}} \\\\t=5\ s

So, the object will take 5 seconds to fall to the ground from the cliff.

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6 0
1 year ago
When heat is removed, how does a gas become a liquid?
White raven [17]
I think the correct answer from the choices listed above is option A. When heat is removed, a gad become a liquid because the  particles in a liquid have less kinetic energy than the particles in gas. As the heat is removed, the particles will experience in decrease of their kinetic energies.
8 0
4 years ago
Read 2 more answers
a ball of mass 0.2kg is fropped from a height of 10m how much mechanical energy does it have right before it hits the ground ass
kherson [118]

Answer:

20 Joules

Explanation:

Mechanical Energy is the sum of kinetic and potential energy.

Since energy can only be transferred and cannot be lost, kinetic energy=potential energy.

Now we only need to use one of the formulas to find the answer. In this answer I'll be using the formula for potential energy which is mass × gravitational field strength ×height.

Substitute the values in and using gfs=10, the answer will be 20J.

7 0
3 years ago
Vaporized gases and released dust form a bright cloud called a(n) ____ around the solid part of a comet.
MissTica
The mixture of gases round the body or nucleus of the comet is called a coma.
5 0
3 years ago
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A Canyon ball is fired from the ground level in angle of 35 from the ground at a speed of 150 m/s ignore air resistance calculat
Virty [35]

The velocity, 50 m/s, has two components - vertical and horizontal velocities.

The vertical component = 50 sin 30 = 25 m/s

The horizontal component = 50 cos 30 = 43.3 m/s

(a)  Let t be the time taken for the vertical component to reach its peak from initial velocity = 25 m/s to its final velocity = 0.

     Using the linear motion equation v = u - gt

     0 = 25 - 10t

     t = 2.5 s

    Time taken to go up and down = 5 s

    Time to hit the ground = 5 s

(b) Horizontal distance dealt x = 43.3 * 5 = 216.5 m

This is not the correct answer, but explains the problem thoroughly.

7 0
3 years ago
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