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lapo4ka [179]
3 years ago
10

A goose waddles 18.0 m north and then 5.00 m east. He then walks 2.00 m south and 2.00 m west. What is the magnitude and directi

on of his displacement?
Physics
1 answer:
olya-2409 [2.1K]3 years ago
7 0
Your answer should be 16.3 m 79.4º east of north
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A particle with mass 1.09 kg oscillates horizontally at the end of a horizontal spring. A student measures an amplitude of 0.985
e-lub [12.9K]

Answer:

a) f = 0.598\,hz, b) v_{max} = 3.701\,\frac{m}{s}, c) k = 15.385\,\frac{N}{m}, d) U = 1.081\,J, e) K = 6.382\,J, f) v\approx 3.422\,\frac{m}{s}

Explanation:

a) The frequency of oscillation is:

f = \frac{76}{127\,hz}

f = 0.598\,hz

b) The angular frequency is:

\omega = 2\pi \cdot f

\omega = 2\pi \cdot (0.598\,hz)

\omega = 3.757\,\frac{rad}{s}

Lastly, the speed at the equilibrium position is:

v_{max} = \omega \cdot A

v_{max} = (3.757\,\frac{rad}{s} )\cdot (0.985\,m)

v_{max} = 3.701\,\frac{m}{s}

c) The spring constant is:

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

k = \omega^{2}\cdot m

k = (3.757\,\frac{rad}{s} )^{2}\cdot (1.09\,kg)

k = 15.385\,\frac{N}{m}

d) The potential energy when the particle is located 38.1 % of the amplitude away from the equilibrium position is:

U = \frac{1}{2}\cdot (15.385\,\frac{N}{m} )\cdot (0.375\,m)^{2}

U = 1.081\,J

e) The maximum potential energy is:

U_{max} = \frac{1}{2}\cdot (15.385\,\frac{N}{m} )\cdot (0.985\,m)^{2}

U_{max} = 7.463\,J

The kinetic energy when the particle is located 38.1 % of the amplitude away from the equilibrium position is:

K = U_{max} - U

K = 7.463\,J - 1.081\,J

K = 6.382\,J

f) The speed when the particle is located 38.1 % of the amplitude away from the equilibrium position is:

K = \frac{1}{2}\cdot m \cdot v^{2}

v = \sqrt{\frac{2\cdot K}{m} }

v = \sqrt{\frac{2\cdot (6.382\,J)}{1.09\,kg} }

v\approx 3.422\,\frac{m}{s}

4 0
3 years ago
An object in projectile motion will follow which path? a]curved up from the ground b]curved down toward the ground c]straight do
Lesechka [4]
It's B because when you throw something it doesn't go up it slowly descends downward
7 0
2 years ago
Read 2 more answers
The density of a sample can be obtained by dividing its __________ by its _______________.
mixer [17]
<span>Density can be calculated and found by dividing the sample's mass by its volume. D=m/v</span>
3 0
3 years ago
An object is moving in a circle. If the radius of the object is doubled, and the period remains constant, the magnitude of the v
Anton [14]

Answer:

Twice

Explanation:

From the formula for velocity in a circle

V= 2πr/T

Where V is velocity

r is raduis

T is period

We see that as r increases V increases so if r is doubled V becomes doubled

4 0
3 years ago
An electric kettle. The input energy is 10 Joules. The useful output energy is heat 9
mina [271]

Answer:

Efficiency = 90 %

Wasted energy = 10 %

Explanation:

Since we have the input energy and useful output energy of the electric kettle, the only thing we are required to calculate here is its efficiency. This is gotten from

E = useful output energy/input energy × 100

E = 9/10 × 100 = 90 %

The percentage of wasted energy is

W = wasted energy/input energy × 100

W = 1/10 × 100

W = 10 %

3 0
3 years ago
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