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4 years ago

As the skydiver falls to Earth, she experiences positive acceleration due to

2 answers:

7 0

It is gravity. As a sky diver falls (ignoring air resistance for now) he increases in acceleration due to gravity, or 9.81m/s^2 (Earth's gravitational acceleration). Inertia is, by definition, <span>a property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force (credit to Google). However, if the sky diver has some kind of webbing on his suit, a drag force opposite to gravitational weight cancels it, and it moves at a constant drag velocity.

Sorry I got carried away... physicist...

It is gravity. Hope this helps!</span>

n200080 [17]4 years ago

4 0

Explanation :

When an object moves under the action of gravity. Then the object is said to be moving under free fall.

We know that the acceleration due to gravity is denoted by g and it is equal to $9.8\ m/s^2$ .

If the body is accelerating towards the gravity the value of g is positive while when it is accelerating against the gravity it is negative.

As the skydiver falls to Earth, she experiences positive acceleration due to gravity.

So, the correct option is (a) gravity.

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Nesterboy [21]

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3 years ago

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A soccer ball is kicked from point Pi at an angle above a horizontal field. The ball follows an ideal path before landing on the

Nutka1998 [239]

Answer:

A. The horizontal velocity vector points to the right & equals v cos Î¸.

Explanation:

The motion describes a parabolic path, where the horizontal speed is constant and the horizontal velocity vector always points to the right and equals v*cos Î¸.

8 0

3 years ago

A hot air balloon is traveling vertically upward at a constant speed of 4.5 m/s. When it is 28 m above the ground, a package is

ella [17]

Answer:

1.97 seconds

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration due to gravity = 9.8 m/s²

$s=ut+\frac{1}{2}at^2\\\Rightarrow 21=4.5t+\frac{1}{2}\times -9.8\times t^2\\\Rightarrow 21=-4.5t-4.9t^2\\\Rightarrow 4.9t^2+4.5t-28=0\\\Rightarrow 49t^2+45t-280=0$

Solving the above equation we get

$t=\frac{-45+\sqrt{45^2-4\cdot \:49\left(-280\right)}}{2\cdot \:49}, \frac{-45-\sqrt{45^2-4\cdot \:49\left(-280\right)}}{2\cdot \:49}\\\Rightarrow t=1.97, -2.89$

So, the time the package was in the air is 1.97 seconds

3 0

3 years ago

What name is given to the property by which objects resist changes in motion?

Reptile [31]

Inertia is the tendency of an object to resist changes in its state of motion.

8 0

3 years ago

8) A plastic rod, initially uncharged, is rubbed with wool and obtains a charge of 10 C. What is the charge on the wool after ru

LenKa [72]

Answer:

The charge on the wool after rubbing is - 10 C

Explanation:

Every uncharged body is electrically neutral, if the plastic rod acquires 10 Coulombs of charge after been rubbed with wool, then the wool will be left with an equal but opposite charge. This shows that the initial charge on the wool is 10 protons and 10 electrons and when the plastic acquires 10 C (10 protons), the wool will be left with excess 10 electrons.

Therefore, the charge on the wool after rubbing is - 10 C (negative 10 Coulombs).

6 0

4 years ago