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
jek_recluse [69]
3 years ago
6

Integrated Concepts When kicking a football, the kicker rotates his leg about the hip joint. (a) If the velocity of the tip of t

he kicker’s shoe is 35.0 m/s and the hip joint is 1.05 m from the tip of the shoe, what is the shoe tip’s angular velocity? (b) The shoe is in contact with the initially stationary 0.500 kg football for 20.0 ms. What average force is exerted on the football to give it a velocity of 20.0 m/s? (c) Find the maximum range of the football, neglecting air resistance.
Physics
1 answer:
icang [17]3 years ago
3 0

Answer:

(a) 33.3 rad/s

(b) 500 N

(c) 40.8 m

Explanation:

Angular velocity \omega  is given by

\omega=\frac {v}{r}

Where v is linear velocity and r is radius of circle

\omega=\frac {35 m/s}{1.05m}=33.3 rad/s

Angular velocity is 33.3 rad/s

(b)

Velocity, v is calculated as

V=\frac {r}{t}  where r is radius of circle and t is time

Making r the subject of the formula

r=vt

In this case, t=20 ms converted to seconds will be 20/1000=0.02 s

r=20*0.02=0.4m

Force, F=ma_{c}  where m is mass and a_{c}  is centripetal acceleration

a_{c}=\frac {v^{2}}{r}  

Therefore

F=m\frac {v^{2}}{r}  

F=05\frac {20^{2}}{0.4}=500N

Force=500 N

(c)

Maximum range covered by the football

d=\frac {v^{2}}{g}sin(2\theta)  where g is gravitational constant taken as 9.8, \theta  is 45 and v is 20 m/s

d=\frac {20^{2}}{9.8}sin((2)(45))=40.8 m

Maximum range covered is 40.8 m

You might be interested in
ILL GIVE BRAINLIST PLS In which circuit does charge reverse direction many times per second?
den301095 [7]

Answer: <u>D. An AC circuit</u>

Explanation:

I took it on a test and it was correct ; )

4 0
3 years ago
In some plants, the pistils don’t Form until a few days after the stamens do.How might this keep a plant from self pollinating
KATRIN_1 [288]

For a flower to be pollinated, pollen from an anther (which is located at the top of the stamen) needs to reach a stigma (at the top of the pistle.) Some plants are genetically capable of pollinating themselves if their own pollen reaches their own stigma; some plants are not capable of self pollination under any circumstances.

For plants that can genetically self pollinate, but would prefer not to, they can avoid this by having their pistil and pollen/stamens mature at different times. If the stamens mature first, the pollen will be dispersed by animals or wind or whatever dispersal mechanism it relies on. Then by the time the pistil is ready to be pollinated, there is no pollen left in that flower to land on the stigma.

3 0
3 years ago
A wave has a wavelength of 7 mm and a frequency of 16 hertz. What is its speed?
Leokris [45]
 0.000112m/s hope this helps


3 0
3 years ago
Read 2 more answers
A conductor carrying a current I = 16.5 A is directed along the positive x axis and perpendicular to a uniform magnetic field. A
Jet001 [13]

To solve this problem we will apply the concepts related to the Magnetic Force, this is given by the product between the current, the body length, the magnetic field and the angle between the force and the magnetic field, mathematically that is,

F = ILBsin \theta

Here,

I = Current

L = Length

B = Magnetic Field

\theta = Angle between Force and Magnetic Field

But \theta = 90\°

F = ILB

Rearranging to find the Magnetic Field,

B = \frac{F}{IL}

Here the force per unit length,

B = \frac{1}{I}\frac{F}{L}

Replacing with our values,

B = \frac{0.130N/m}{16.5}

B = 0.0078T

Therefore the magnitude of the magnetic field in the region through which the current passes is 0.0078T

6 0
3 years ago
Suppose you increase your walking speed from 4 m/s to 13 m/s in a period of 3 s. What is your acceleration?
iogann1982 [59]

The acceleration formula goes like this: a= (vf-vi)/t so it would be (13-4)/3 Thus the answer is 3m/s^2

7 0
3 years ago
Other questions:
  • A light beam shines through a slit and illuminates a distant screen. The central bright fringe on the screen is 1.00 cm wide, as
    7·1 answer
  • 5. Describe the relationship between frequency and wavelength.
    11·2 answers
  • The vertical deflecting plates of a typical classroom oscilloscope are a pair of parallel square metal plates carrying equal but
    5·1 answer
  • A nonconducting sphere has radius R = 2.81 cm and uniformly distributed charge q = +2.35 fC. Take the electric potential at the
    7·1 answer
  • A solid ball of inertia m rolls without slipping down a ramp that makes an angle θ with the horizontal.
    11·1 answer
  • g The fundamental premise of simple harmonic motion is that a force must be proportional to an object's displacement. Is anythin
    14·1 answer
  • 44. Belly-flop Bernie dives from atop a tall flagpole into a swimming pool below. His potential energy at the top is 10,000 J (r
    10·1 answer
  • This is stupid but my brain isn't working right now so im counting on someone else
    6·1 answer
  • When a wire is attached to the negative terminal of a battery, what happens?
    15·2 answers
  • Can someone please answer this, ill give you brainliest and your getting 100 points.
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!