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
vovangra [49]
3 years ago
9

A runner whose mass is 54 kg accelerates from a stop to a speed of 7 m/s in 3 seconds. (A good sprinter can run 100 meters in ab

out 10 seconds, with an average speed of 10 m/s.) (a) What is the average horizontal component of the force that the ground exerts on the runner's shoes? (b) How much work is done on the point-particle system by this force?
Physics
1 answer:
Darya [45]3 years ago
6 0

Answer:

a. F=126N

b. E_K=1323J

Explanation:

Given:

m=54kg

v=7 m/s

t= 3s

The runner force average to find given the equations

a.

F=m*a

a=\frac{v}{t}

F=m*\frac{v}{t}=54kg*\frac{7m/s}{3s}

F=126N

b.

Work done by the system by this force so

W=F*d

W=E_K

E_K=\frac{1}{2}*m*v^2

E_K=\frac{1}{2}*54kg*(7m/s)^2

E_K=1323J

You might be interested in
. How does the area of a rectangle relate to the lengths of each side?
iragen [17]
Area is 2-dimensional which means it has a length and a width area is measured in square units such as square inches, square feet or square meters. To find the area of a rectangle multiply the length by the width.
3 0
3 years ago
Read 2 more answers
PLEASE ANSWER QUICKLY
Rom4ik [11]

Answer:

a luminous ball of plasma

6 0
3 years ago
How to find volume metric
disa [49]
You multiply the high length and width and if your using centimeters then divide by 500 and then there's your answer.hoped this helped.
8 0
3 years ago
Which of the following cannot be determined by analyzing the periodic table?
dybincka [34]

Your answer is C) The year the element was discovered :)

4 0
3 years ago
Read 2 more answers
Find the mass of a football player who has 1420 N of force and an acceleration of 4 m/s^2 *
Hatshy [7]
The answer is 833.3 kg
7 0
3 years ago
Other questions:
  • Dark clothing feels warmer than white clothing on a sunny day. Which interaction causes the dark clothing to feel warm?
    15·2 answers
  • How could we expect a white paper to appear when viewed in a red light?
    15·1 answer
  • The formula d = t² + 5 t expresses a car's distance (in feet) from a stop sign, d, in terms of the number of seconds t since it
    10·1 answer
  • What is a lunar eclipse summary
    14·2 answers
  • Which equals 23 kilograms?
    10·2 answers
  • 1 st QUESTION: In the raisin experiment what was your first step of the scientific method?
    15·1 answer
  • What is the strength of the electric field between two parallel conducting plates separated by 1.00 cm and having a potential di
    7·1 answer
  • A cell has an emf of 1.5 V and an internal resistance of 0.65 Q.
    8·1 answer
  • Plisssss you can help me pliss
    14·1 answer
  • Which of these atoms is the most electronegative? select one: a. si b. cl c. p d. f e. c
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!