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
uranmaximum [27]
3 years ago
13

A fullback preparing to carry the football starts from rest and accelerates straight ahead. He is handed the ball just before he

reaches the line of scrimmage. Assume that the fullback accelerates uniformly (even during the handoff), reaching the line with a velocity of 7.60 m/s. If he takes 1.07 s to reach the line, how far behind it did he start?
Physics
1 answer:
RideAnS [48]3 years ago
4 0

Answer:

x=4.06m

Explanation:

A body that moves with constant acceleration means that it moves in "a uniformly accelerated movement", which means that if the velocity is plotted with respect to time we will find a line and its slope will be the value of the acceleration, it determines how much it changes the speed with respect to time.

When performing a mathematical demonstration, it is found that the equations that define this movement are as follows.

Vf=Vo+a.t  (1)\\\\

{Vf^{2}-Vo^2}/{2.a} =X(2)\\\\

X=Xo+ VoT+0.5at^{2}    (3)\\

Where

Vf = final speed

Vo = Initial speed

T = time

A = acceleration

X = displacement

In conclusion to solve any problem related to a body that moves with constant acceleration we use the 3 above equations and use algebra to solve

for this problem

Vf=7.6m/s

t=1.07

Vo=0

we can use the ecuation number one to find the acceleration

a=(Vf-Vo)/t

a=(7.6-0)/1.07=7.1m/s^2

then we can use the ecuation number 2 to find the distance

{Vf^{2}-Vo^2}/{2.a} =X

(7.6^2-0^2)/(2x7.1)=4.06m

You might be interested in
My Exams are coming.so, please tell me some ways to score good marks?​
Citrus2011 [14]

Instead of asking this question go and study

5 0
2 years ago
Read 2 more answers
During a braking test, a car is brought to rest beginning from an initial speed of 60 mi/hr in a distance of 120 ft. With the sa
maw [93]

Answer:

Explanation:

Given

Initial speed u=60\ mi/hr\approx 88\ ft/s

distance traveled before coming to rest d_1=120\ ft

using equation of motion

v^2-u^2=2as

where v=final velocity

u=initial velocity

a=acceleration

s=displacement

0-(88)^2=2\times a\times 120---1

for u_2=80\ mi/hr\approx 117.33\ ft/s

using same relation we get

0-(117.33)^2=2\times a\times (d_2)----2

divide 1 and 2 we get

(\frac{88}{117.33})^2=\frac{120}{d_2}

d_2=213.32\ ft

So a distance if 213.32 ft is required to stop the vehicle with 80 mph speed

8 0
3 years ago
Which one of the following statements does not accurately describe vibrations?
Ivanshal [37]

This is an example of resonance - when one object vibrating at the same natural frequency of a second object forces that second object into vibrational motion. The result of resonance is always a large vibration.

Answer D. Forced vibrations, such as those between a tuning fork and a large cabinet surface, result in a much lower sound than was produced by the original vibrating body Because this statement contridicts the above statement, it is not accurate

6 0
3 years ago
Read 2 more answers
What is an ion and how does an atom become both positive or negative ion?
Bess [88]

Answer:

An ion is an atom or group of atoms with a positive or negative charge. Ions form when atoms lose or gain electrons to obtain a full outer shell: metal atoms lose electrons to form positively charged ions non-metal atoms gain electrons to form negatively charged ions.

Explanation:

8 0
3 years ago
Which has more momentum, a heavy truck moving at 30 miles per hour or a light truck moving at 30 miles per hour?
valentina_108 [34]
A heavy truck moving a 30 mph. It has more mass.
7 0
3 years ago
Read 2 more answers
Other questions:
  • What are common features of both the MMPI-2 and CPI? Select all that apply.
    12·1 answer
  • Choose all the answers that apply.
    11·2 answers
  • Why does the moon go through phases?
    13·2 answers
  • What effect does Earth’s spherical shape have on the amount of sunlight that reaches the equator?
    14·1 answer
  • On the average, about what percentage of the solar energy that strikes the outer atmosphere eventually reaches the earth's surfa
    12·1 answer
  • The blank represent the different forms of electromagnetic radiation
    6·1 answer
  • Two astronauts of mass 100 kg are 2 m apart in outer space. What is the
    15·2 answers
  • Why does water frozen in the cracks of a rock help to break down the rock? a) Water expands when frozen and chemically forces th
    9·1 answer
  • a boat sailing against the current experiences an acceleration of -11 m/s^2 if the boats initial velocity is 44 m/s upstream, ho
    8·1 answer
  • 13. What is the acceleration of a 1,000-kilogram truck with a net force of 7,000 newtons?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!