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
aliina [53]
3 years ago
13

a runner covers the last straight stretch of the race in 4 s. durning that time, he speeds up from 5 m/s to 9m/s what is the run

ners acceleration in this part of the race?
Physics
1 answer:
Sergio039 [100]3 years ago
5 0

Answer:

The runner's acceleration was 1\ m/s^2

Explanation:

<u>Constant Acceleration Motion</u>

It's a type of motion in which the velocity of an object changes by an equal amount in every equal period of time.

Being a the constant acceleration, vo the initial speed, vf the final speed, and t the time, the following relation applies:

v_f=v_o+at

Solving for a:

\displaystyle a=\frac{v_f-v_o}{t}

The runner speeds up from vo=5 m/s to vf=9 m/s in t=4 seconds, thus:

\displaystyle a=\frac{9-5}{4}

\displaystyle a=\frac{4}{4}=1

The runner's acceleration was 1\ m/s^2

You might be interested in
English or metric <br> What is 16in to cm
il63 [147K]
40.64 cm is the answer to your question.
6 0
3 years ago
What is eletro magnet
Leona [35]
A soft metal core made into a magnet by the passage of electric current through a coil surrounding it.
7 0
2 years ago
Why is the sun so far away
aev [14]

Answer:

If it was close we would die.

Explanation:

Probably has something to do with the earths original formation.

5 0
2 years ago
Read 2 more answers
What is 3600Hz has in rpm?​
Setler [38]

Answer:

Explanation:

N=Rotor Speed in Revolution per minute(rpm)

for P=4 and N=3600, f comes out to be 120 Hz.

So frequency of voltage produced is 120 Hz. But this is not practical. Generally 4-Pole generator has N=1500rpm(for 50 Hz) or 1800rpm for 60 Hz. Two pole generator can have N=3600rpm(f=60Hz).

The most practical situation is generator having N=3600Hz with 2 Poles.

Hope It will be helpful!!!

8 0
3 years ago
Lifting a piano into a truck is an example of doing negative work. A. True B. False
Elis [28]

Answer:

False

Explanation:

5 0
2 years ago
Other questions:
  • For a particular reaction, Δ H ∘ = − 93.8 kJ and Δ S ∘ = − 156.1 J/K. Assuming these values change very little with temperature,
    15·1 answer
  • Literally don't know how to do this.
    9·1 answer
  • How do coal deposits found in the U.S. and Serbia help prove the theory of continental drift?
    5·1 answer
  • a satellite is traveling in a orbit around the earth. what change would cause it to experience more gravitational force from the
    9·1 answer
  • Beyond what point must an object be squeezed for it to be a black hole? A : Schwarzschild Radius. B : Crackpoint. C : Event Hori
    10·2 answers
  • Three blocks of metal at the same temperature are placed on a hot stove. Their specific heat capacities are listed below. Rank t
    6·1 answer
  • What was the name of the first man made satellite launched by the Soviet Union in 1957.​
    15·1 answer
  • Examples of impact printers​
    6·1 answer
  • 18)
    15·1 answer
  • 1. A student adds water and sugar to a jar and seals the jar so that nothing can get in or out. The
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!