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o-na [289]
3 years ago
7

A light string is wrapped around a spool (shape is unknown, thus you do not know moment of inertia I) of radius 0.5 m. A 5.0-kg

mass is hung from the string, causing the spool to rotate and the string to unwind. The spool rotates from rest to 10 rad/s in 2 s. Find (a) the angular acceleration of spool, (b) moment of inertia I, and (c) the tension on the string.
Physics
1 answer:
olga_2 [115]3 years ago
6 0

Answer:

a) angular acceleration  α = 5 rad/sec

b) MOI = 1.25 kgm^2

c) Tention in the string T = 12.5 N

Explanation:

The solution to the question has been provided in the attachment, please refer to that.

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a cylindrical jar is 10cm long and has a cross sectional area of 36cm. if it is completely filled with a fluid of relative densi
ki77a [65]

Answer:

The mass of the fluid is 72 g.

Explanation:

The following data were obtained from the question:

Height (h) = 10 cm

Area of cross section (A) = 36cm²

Relative density = 0.2

Mass =..?

Next, we shall determine the volume of the cylinder. This can be achieved by doing the following:

Volume = Area x Height

Volume = 36 x 10

Volume = 360 cm³

Next, we shall determine the density of the liquid.

This can be obtained as follow:

Relative density = density of substance/density of water.

Relative density = 0.2

Density of water = 1 g/cm³

Density of fluid =...?

Relative density = density of substance/density of water.

0.2 = density of fluid / 1 g/cm³

Cross multiply

Density of fluid = 0.2 x 1 g/cm³

Density of fluid = 0.2 g/cm³

Finally, we shall determine the mass of fluid as follow:

Volume = 360 cm³

Density of fluid = 0.2 g/cm³

Mass of fluid =...?

Density = mass /volume.

0.2 g/cm³ = mass of fluid /360 cm³

Cross multiply

Mass of fluid = 0.2 g/cm³ x 360 cm³

Mass of fluid = 72 g

Therefore, the mass of the fluid in the jar is 72 g.

6 0
4 years ago
HELP ASAP WITH number 6 plz
Alika [10]
The answer would be c
6 0
4 years ago
What is the single most important factor that determines why Earth (or almost any planet in the Solar System) experiences season
kirill [66]

Answer:

Planetary seasons are caused by two factors:

1. axial tilt and

2. variable distance from the sun

Explanation:

Earth's orbit is nearly circular and so has little effect on climate. It's our planet's axial tilt that causes almost all seasonal changes.

You can read further; Planetary seasons

6 0
3 years ago
Which of these is the unit of measure for work?
Anastasy [175]
The SI unit of measure for work, as well as
for all other kinds of energy, is the "joule".
7 0
3 years ago
Read 2 more answers
Children slide down a frictionless water slide that ends at a height of 1.80 m above the pool. If a child starts from rest at po
Lerok [7]

Answer:

h = 1.75 m

Explanation:

As we know that height of the slide is given as

h = 1.80 m

so time taken by the child to hit the water from the slide is given as

t = \sqrt{\frac{2h}{g}}

now we will plug all data in it

t = \sqrt{\frac{2(1.80)}{9.81}}

t = 0.605 s

now we know that the horizontal distance moved by it is given as

L = v_x t

3.55 = 0.605 v_x

v_x = 5.86 m/s

now by energy conservation

mgh = \frac{1}{2}mv^2

so height of point A is given as

h = \frac{v_x^2}{2g}

h = \frac{5.86^2}{2(9.81)}

h = 1.75 m

3 0
4 years ago
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