1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Dmitry_Shevchenko [17]
3 years ago
9

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

30.0 ????. The force is applied over 0.3 seconds. How long does the pendulum have to be to have a period of 5.0 seconds? What is the maximum angle of displacement of the swinging pendulum?
Physics
1 answer:
Phoenix [80]3 years ago
4 0

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.}

You might be interested in
A student evaluates a weight loss program by calculating the number of times he would need to climb a 14.0 m high flight of step
Liula [17]

Answer:

400 trips

Explanation:

Mechanical energy needed to climb 14 m by a man of 68 kg

= mgh

= 68 x 9.8 x 14

= 9330 J

1 Kg of fat releases 3.77 x 10⁷ J of energy

.45 kg of fat releases 1.6965 x 10⁷ J of energy

22% is converted into mechanical energy

so 22% of 1.6965 x 10⁷ J

= 3732.3 x 10³ J of mechanical energy will be available for mechanical work.

one trip of climbing of 14 m requires 9330 J of mechanical energy

no of such trip possible with given mechanical energy

= 3732.3 x 10³ / 9330

= 400 trips

7 0
3 years ago
A coin of diameter 2.54cm placed at 2.54m
ratelena [41]

Answer:

127

hsnjsmsks,,s,s,ssmskks

3 0
2 years ago
Help me pls, I need it now​
posledela

6.) a

7.) d

8.) b

9.) b

10.) a

3 0
2 years ago
rectangular plate, whose streamwise dimension (or chord c) is 0.2 m and whose width (or span b) is 1.8 m, is mounted in a wind t
Andrei [34K]

Answer:

See explaination for the details of the answer.

Explanation:

Density is a measurement that compares the amount of matter an object has to its volume. An object with much matter in a certain volume has high density An object with little matter in the same amount of volume has a low density. Density is found by dividing the mass of an object by its volume.

The Calculate of the chordwise distribution of the skin friction coefficient and the displacement thickness is done and represented in the attachment.

Please kindly check attachment for the step by step answer.

8 0
3 years ago
If your mass is 63.7 kg, and you are standing 7.5 m away from a boulder with
murzikaleks [220]

Answer:

B

Explanation:

F=\frac{Gm1m2}{r^2}

F=(6.67 x 10^-11)\frac{63.7X9,750.6}{7.5^2}

F=7.36502254e-7

4 0
1 year ago
Other questions:
  • Point charge q1 of 30 nC is separated by 50 cm from point charge q2 of -45 nC. As shown in the diagram, point a is located 30 cm
    15·1 answer
  • Which of the following characterizes Erikson's identity versus role formation stage?
    13·2 answers
  • A train station bell gives off a fundamental tone of 500 Hz as the train approaches the station at a speed of 20 m/s. If the spe
    6·1 answer
  • How do i solve?<br><br>a = bc<br>(b)​
    14·1 answer
  • If the pendulum is brought on the moon where the gravitational acceleration is about g/6, approximately what will its period now
    7·1 answer
  • A 163 ‑turn circular coil of radius 2.65 cm and negligible resistance is immersed in a uniform magnetic field that is perpendicu
    5·1 answer
  • A train at a constant 79.0 km/h moves east for 27.0 min, then in a direction 50.0° east of due north for 29.0 min, and then west
    8·1 answer
  • Gave the examples of Civil law​
    10·2 answers
  • If i apply 280 n of force to a 40kg object, what will it's acceleration be?
    5·1 answer
  • Suppose you are an engineer building a road across a mountain. From a prudential point of view, it would be easier and cheaper t
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!