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sattari [20]
3 years ago
8

Why can someone please help me out

Physics
1 answer:
denis23 [38]3 years ago
4 0
D I think hope this helps
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A pendulum of mass 5.0 kg hangs in equilibrium. A frustrated student walks up to it and kicks the bob with a horizontal force of
Phoenix [80]

Answer:

The length is L = 6.206m and the angle is \theta = 37.752^o.

Explanation:

The period T of the pendulum is related to its length L by

T = 2\pi \sqrt{\dfrac{L}{g} },

where g =9.8m/s^2 is the acceleration due to gravity.

Solving for L we get

L = \dfrac{T^2g}{4\pi^2}

putting in T =5.0s and g =9.8m/s^2 we get:

L = \dfrac{(5.0s)^2*9.8m/s^2}{4\pi^2}

\boxed{L = 6.206m.}

There are two forces acting on the pendulum: The gravitational force mg and the F = 30N student's force. Therefore, the angular displacement \theta that these forces give is

sin(\theta ) = \dfrac{F}{mg}

\theta = sin^{-1}( \dfrac{F}{mg})

putting in F =30N, m =5.0kg, and g =9.8m/s^2 we get

\theta = sin^{-1}( \dfrac{30N}{5.0kg*9.8m/s^2})

\boxed{\theta = 37.752^o.}

4 0
4 years ago
Which statement best describes how waves carry energy?
Ugo [173]

Answer:

Energy moves from one place to another through the wave. answer A

7 0
3 years ago
Read 2 more answers
When a 1.50V battery is shorted by a copper wire whose resistance can be ignored, the current through the copper wire is 2.75 A.
viva [34]

Answer:

Internal resistance = 0.545 ohm

Explanation:

As per ohm's law we know that

V = iR

here we know that

i = electric current = 2.75 A

V = potential difference = 1.50 Volts

now from above equation we have

1.50 = 2.75 ( R)

now we have

R = \frac{1.50}{2.75}

R = 0.545 ohm

5 0
3 years ago
a sports car has a mass of 1300kg.Starting from the rest the car generates a force of 4400 N.The frictional force opposing this
viktelen [127]

since the car moves, the force needed to move is greater than the frictional forces opposing it

a = 3.17m/s²

5 0
3 years ago
Is the study of the muscle movements in the human body an example of biology or of physics
Sophie [7]
Biology since its dealing with the human body
5 0
3 years ago
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