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A disc initially at rest experiences an angular acceleration of 3.11 rad/s for a time of 15.0 s. What will the angular speed of

kolezko [41]

Answer:

The angular speed of the disc be at this time is 46.65 rad/s.

Explanation:

Given that,

Angular acceleration $\alpha= 3.11\ rad/s^2$

Time t =15.0 s

We will calculate the angular speed of the disc

A disc initially at rest.

So, $\omega=0$

Using rotational kinematics equation

$\omega'=\omega+\alpha\ t$

Where, $\omega$ = initial angular speed

$\omega'$ =final angular speed

$\alpha$ = angular acceleration

Put the value in the equation

$\omega'=0+3.11\times15$

$\omega'=46.65\ rad/s$

Hence, The angular speed of the disc be at this time is 46.65 rad/s.

6 0

3 years ago

A pendulum has a mass of 0.060 kg swinging at a small angle from a light string, with a period of 1.4 s. What is the length of t

jok3333 [9.3K]

Answer:

0.5 m

Explanation:

From the question given above, the following data were obtained:

Mass (m) = 0.060 kg

Period (T) = 1.4 s

Lenght (L) =?

NOTE:

1. Acceleration due to gravity (g) = 10 m/s²

2. Pi (π) = 3.14

The length of the pendulum can be obtained as follow:

T = 2π√(L/g)

1.4 = 2 × 3.14 × √(L/10)

1.4 = 6.28 × √(L/10)

Divide both side by 6.28

1.4 / 6.28 = √(L/10)

Take the square of both side

(1.4 / 6.28)² = L/10

Cross multiply

L = 10 × (1.4 / 6.28)²

L = 0.5 m

Therefore, the length of the pendulum is 0.5 m

4 0

3 years ago

Read 2 more answers

A gry is an old English measure for length, defined as 1/10 of a line, where line is another old English measure for length, def

Rashid [163]

Answer:

0.0576 points²

Explanation:

$1\ gry=\frac{1}{10}\ line$

$1\ line=\frac{1}{12}\ inch$

$\frac{1}{10}\ line=\frac{1}{10}\times \frac{1}{12}\ inch\\\Rightarrow \frac{1}{10}\ line=\frac{1}{120}\ inch$

$\therefore 1\ gry=\frac{1}{120}\ inch$

$1\ point=\frac{1}{72}\ inch\\\Rightarrow 72\ points=1\ inch$

$\\\Rightarrow \frac{1}{120}\ inch=\frac{1}{120}\times 72\ points$

$1\ gry=\frac{72}{120}\ point\\\Rightarrow 1\ gry=0.6\ point$

$0.16\ gry^2=0.6^2\times 0.16\\\Rightarrow 0.16\ gry^2=0.0576\ points^2$

∴ Area of 0.16 gry² is 0.0576 points²

8 0

3 years ago

Which three elements have strong magnetic properties?

Elodia [21]

The answer is D. <span>iron, cobalt, and nickel</span>

8 0

3 years ago

Read 2 more answers

Calculate the force necessary to accelerate a 10 kg table from<br> O m/s to 4 m/s in 2 seconds.

yanalaym [24]

Answer:

a= v/t

a = 4/2

a = 2 m/s^2

And F = M a

F = 10 × 2

F = 20 N

6 0

3 years ago