If a 2 kg spring is compressed by exerting a force of 10 newtons a distance of 50 cm how much work is done?

How tightly does mass need to be compacted in order to become a black hole??? (2 words)

olga55 [171]

is it infinite density?

8 0

3 years ago

To test the quality of a tennis ball, you drop it onto the floor from a height of 4.00 m. It rebounds to a height of 2.00 m. If

arlik [135]

Answer:

Part a)

$a = 1260.3 m/s^2$

Part b)

Direction = upwards

Explanation:

When ball is dropped from height h = 4.0 m

then the speed of the ball just before it will strike the ground is given as

$v_f^2 - v_i^2 = 2 a d$

$v_1^2 - 0^2 = 2(9.81)(4.0)$

$v_1 = 8.86 m/s$

Now ball will rebound to height h = 2.00 m

so the velocity of ball just after it will rebound is given as

$v_f^2 - v_i^2 = 2 a d$

$0 - v_2^2 = 2(-9.81)(2.00)$

$v_2 = 6.26 m/s$

Part a)

Average acceleration is given as

$a = \frac{v_f - v_i}{\Delta t}$

$a = \frac{6.26 - (-8.86)}{12.0 \times 10^{-3}}$

$a = 1260.35 m/s^2$

Part B)

As we know that ball rebounds upwards after collision while before collision it is moving downwards

So the direction of the acceleration is vertically upwards

7 0

3 years ago

Fernanda is working on a physics project. she is experimenting by rolling a marble down a ramp and then seeing how far it rolls

Ratling [72]

The distance covered on the floor after leaving the ramp is the dependent variable.

As a result of the marble's size, the substance it is constructed of, and the angle at which it is placed onto the ground, the distance it rolls varies.
Therefore, the angle at which the marble is released onto the ground, the type of material used to make the stone, or its size can all be considered independent variables.

<h3>What is Independent variable?</h3>

There are independent and dependent variables in every experiment.
A variable is considered independent if its change is not influenced by the change in another variable or factor.

<h3>What is Dependent variable?</h3>

In any experiment, the dependent variable must be measured or determined, and it must change as the independent variable does.

Learn more about independent and dependent variable here:

brainly.com/question/1479694

#SPJ4

5 0

2 years ago

A very long wire generates a magnetic field of 0.0020x 10^-4 T at a distance of 10 mm. What is the magnitude of the current? A)

zimovet [89]

Answer:

2*10^-5

Explanation:

B=IL

I=B/L

I=0.0020*10^-4/10

I=2*10^5

6 0

3 years ago

Captain Jack Sparrow has been marooned on an island in the Atlantic by his crew, and decides to builda raft to escape. The wind

Marianna [84]

Answer:

d₃ = 37,729 km, θ= 5.1º North of West

Explanation:

This is a velocity addition problem, the easiest way to solve it is to decompose the velocities in a Cartesian system, the x-axis coincides with the West-East direction and the y-axis with the South-North direction

* first displacement is

d₁ₓ = 11 km

* second offset is

cos 6 = d₂ₓ / d₂

sin 6 = d_{2y} / d₂

d₂ₓ = d₂ cos 6

d_{2y} = d₂ sin 6

d₂ₓ = 6 cos 6 = 5.967 km

d_{2y} = 6 sin 6 = 0.6272 km

* third displacement is unknown

* fourth and last displacement

cos (-11) = d₄ₓ / d₄

sin (-11) = d_{4y} / d₄

d₄ₓ = d₄ cos (-11)

d_{4y} = d₄ sin (-11)

d₄ₓ = 21 cos (-11) = 20.61 km

d_{4y} = 21 sin (-11) = -4.007 km

They tell us that at the end of the tour you are back on the island, so the displacement must be zero

X axis

x = d₁ₓ + d₂ₓ + d₃ₓ + d₄ₓ

0 = 11 +5.967 + d₃ₓ + 20.61

d₃ₓ = -11 - 5.967 - 20.61

d₃ₓ = -37.577 km

Y axis

y = d_{1y} + d_{2y} + d_{3y} + d_{4y}

0 = 0 + 0.6272 + d_{3y} -4.007

d_{3y} = 4.007 - 0.6272

d_{3y} = 3.3798 km

This distance can be given in the form of module and angle

Let's use the Pythagorean theorem for the module

d₃ = $\sqrt{d_{3x}^2 + d_{3y}^2}$

d₃ = $\sqrt{37.577^2 + 3.3798^2}$

d₃ = 37,729 km

Let's use trigonometry for the angle

tan θ = d_{3y} / d₃ₓ

θ = tan⁻¹ $\frac{d_{3y}}{d_{3x}}$

θ = tan-1 (-3.3798 / 37.577)

θ = 5.1º

Since the y coordinate is positive and the x coordinate is negative, this angle is in the second quadrant, so the direction given in the form of cardinal coordinates is

θ= 5.1º North of West

3 0

2 years ago