3 years ago

Include units with all of your answers. A 1.84 kg bucket full of water is attached to a 0.76 m long string.

1 answer:

7 0

<span>c. What is the magnitude of the tension in the string at the bottom of the circle if you are swinging it at 3.37 m/s? </span>

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crimeas [40]

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3 years ago

How much energy in joules does it take to raise the temperature of 1.5kg of aluminum from 20 degrees Celsius to 40 degrees Celsi

masya89 [10]

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3 years ago

A rod of length 20 cm has two beads attached to its ends. The rod with beads starts rotating from rest. If the beads are to have

exis [7]

Answer:

$\alpha=28.57\frac{rad}{s^2}$

Explanation:

We use the following rotational kinematic equation to calculate the angular acceleration of the rod:

$\omega_f=\omega_0+\alpha t$

Here $\omega_f$ is the final angular speed, $\omega_0\\$ is the initial angular speed and $\alpha$ is the angular acceleration. The rod starts rotating from rest ( $\omega_0=0$ ):

$\alpha=\frac{\omega_f}{t}(1)$

Recall that the angular speed is defined in function of the tangential speed (v) and the radius (r) of the circular motion:

$w_f=\frac{v_f}{r}(2)$

In this case the radius is given by $r=\frac{20*10^{-2}m}{2}=0.1m$ . Replacing (2) in (1):

$\alpha=\frac{v_f}{rt}\\\alpha=\frac{20\frac{m}{s}}{(0.1m)7s}\\\alpha=28.57\frac{rad}{s^2}$

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3 years ago