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
forsale [732]
3 years ago
9

An elephant's legs have a reasonably uniform cross section from top to bottom, and they are quite long, pivoting high on the ani

mal's body. When an elephant moves at a walk, it uses very little energy to bring its legs forward, simply allowing them to swing like pendulums. For fluid walking motion, this time should be half the time for a complete stride; as soon as the right leg finishes swinging forward, the elephant plants the right foot and begins swinging the left leg forward. An elephant has legs that stretch 2.3 from its shoulders to the ground. How much time is required for one leg to swing forward after completing a stride? What would you predict for this elephant's stride frequency? That is, how many steps per minute will the elephant take?
Physics
1 answer:
PilotLPTM [1.2K]3 years ago
4 0

Answer:

 t = 6,485 s ,  t_step = 25.94 s

the elephant gives 2.3 step very minute

Explanation:

Let's approximate this system to a simple pendulum that has angular velocity

            w = √L / g

Angular velocity and period are related

           w = 2π / T

           T = 2π √g / L

Let's find the period

           T = 2π √9.8 / 2.3

           T = 12.97 s

Stride time is

           t = T / 2

           t = 12.97 / 2

           t = 6,485 s

Frequency is inversely proportional to period

            f = 1 / t

            f = 1 / 6,485

            f = 0.15 Hz

Since the elephant has 4 legs and each uses a time t, the total time for one step is

            t_step = 4 t

            t_step = 4 6.485

            t_step = 25.94 s

             f_step = 1/t_step =0.0385 s-1

Now let's use a proportion rule to find the number of steps in 60 s

           #_step = 60 / t_step

           #__step = 60 / 25.94

           #_step = 2.3 steps

So the elephant gives 2.3 step very minute

You might be interested in
A parallel circuit has a 125 Volt battery connected with 3 resistors. R1= 20 Ω, R2= 100 Ω, and R3= 50 Ω. Find the total current
Musya8 [376]

Answer:

10A

Explanation:

to calculate r

1/R=1/20+1/100+1/50=2/25

r=25/2=12.5

I=125/12.5=10A

8 0
3 years ago
Read 2 more answers
Which type of wave interaction is shown in the diagram?
masya89 [10]

Answer: Constructive interference

Explanation: Just took the test

5 0
3 years ago
Use Newton’s first law to explain why a book on a desk does not move
rewona [7]

Answer:

nothing moves if anything other doesn't move it.

natural position of things is the resting

Explanation:

yeah that's it

5 0
2 years ago
Read 2 more answers
two objects are in uniform circular motion at the same speed but at different radii. the ones with the __ radius has the largest
Cerrena [4.2K]

Answer:the one with the smaller radius has the highest centripetal force

Explanation:

5 0
3 years ago
Read 2 more answers
If a book has a a mass of 2 kg, how much does the book weigh?
Inessa05 [86]

Answer:

A. 20 N

Explanation:

Weight of the book = mass × acceleration due to gravity

= 2 × 10

= 20 N

6 0
2 years ago
Read 2 more answers
Other questions:
  • A unit is an amount used to measure something True or false
    14·1 answer
  • A 2100 g block is pushed by an external force against a spring (with a 22 N/cm spring constant) until the spring is compressed b
    14·1 answer
  • A 388 Hz tuning fork is resonating in a closed tube on a warm day when the speed of sound is 346 m/s. What is the length of the
    9·2 answers
  • a straight wire that is 0.60m long and carrying a current of 2.0a is placed at an angle with respect to a magnetic field of stre
    6·1 answer
  • Knowing that a ball traveled 16 feet in one second, how much will it travel in the first quarter second?
    15·2 answers
  • Mrs. Paul and Dr. Mykannen ride a tandem bike on the beach. They ride along the beach for about 455 meters. Their final velocity
    14·1 answer
  • FREE BRAINLEST JUST COMMENT MRBEAST
    8·2 answers
  • un movil que parte del reposo alcanza una velocidad de 75 m/s en 13 segundos ¿cual su aceleracion y el espacio que recorrio en l
    7·1 answer
  • Below is a physics question
    13·1 answer
  • Question is in the pic
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!