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ZanzabumX [31]
4 years ago
12

A 150 g air-track glider is attached to a spring. The glider is pushed in 8.80 cm and released. A student with a stopwatch finds

that 10.0 oscillations take 17.0 s .What is the spring constant?
Physics
1 answer:
Alla [95]4 years ago
5 0

Answer:

2.06 N/m

Explanation:

The system makes 10.0 complete oscillations in 17.0 s. So, the frequency of the system is

f=\frac{10.0}{17.0 s}=0.59 Hz

The angular frequency of the system is given by

\omega = 2\pi f=2\pi (0.59 Hz)=3.71 rad/s

In a simple harmonic motion, the angular frequency is related to the mass and the spring constant by

\omega=\sqrt{\frac{k}{m}}

where

k is the spring constant

m is the mass

Here we know

\omega=3.71 rad/s\\m = 150 g = 0.150 kg

So we can solve the formula to find k:

k=\omega^2 m = (3.71 rad/s)^2 (0.150 kg)=2.06 N/m

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A goalie kicks a soccer ball straight vertically into the air. It takes 5.00 s for the ball to reach its maximum height and come
Yuliya22 [10]

Answer:

(a)    vo = 24.98m/s

(b)    t = 5.09 s

Explanation:

(a) In order to calculate the the initial speed of the ball, you use the following formula:

y=y_o+v_ot-\frac{1}{2}gt^2      (1)

y: vertical position of the ball = 2.44m

yo: initial vertical position = 0m

vo: initial speed of the ball = ?

g: gravitational acceleration = 9.8m/s²

t: time on which the ball is at 2.44m above the ground = 5.00s

You solve the equation (1) for vo and replace the values of the other parameters:

v_o=\frac{y-y_o+1/2gt^2}{t}        

v_o=\frac{2.44m-0.00m+1/2(9.8m/s^2)(5.00s)^2}{5.00s}\\\\v_o=24.98\frac{m}{s}

The initial speed of the ball is 24.98m/s

(b) To find the time the ball takes to arrive to the ground you use the equation (1) for y = 0m (ground) and solve for t:

0=24.98t-\frac{1}{2}(9.8)t^2\\\\t=5.09s

The time that the ball takes to arrive to the ground is 5.09s

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3 years ago
Which statement best describes what happens at the site of a divide?
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Answer:

C. Streams on each side of the divide flow in opposite directions.

Explanation:

Just took the assessment on edgenuit.

7 0
3 years ago
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BigorU [14]

The "missing" 4 kg may have escaped the scene of the fire in the
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Answer:

Explanation:

purchase price = 400 tepizes / m²

1 tepiz = .625 dollar

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= 250 dollar / m²

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price in terms of dollar / yards²

= 250 / 1.196 dollar / yard²

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Explanation:

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