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FrozenT [24]
2 years ago
13

A sprinter set a high school record in track and field, running 200.0 m in 20.6 s . what is the average speed of the sprinter in

kilometers per hour?

Physics
2 answers:
Paraphin [41]2 years ago
8 0

Answer : The average speed of the sprinter is, 34.95 Km/hr

Solution :

Average velocity : It is defined as the distance traveled by the time taken.

Formula used for average velocity :

v_{av}=\frac{d}{t}

where,

v_{av} = average velocity

d = distance traveled = 200 m

t = time taken = 20.6 s

Now put all the given values in the above formula, we get the average velocity of the sprinter.

v_{av}=\frac{200m}{20.6s}\times \frac{3600}{1000}=34.95Km/hr

conversion :

(1 Km = 1000m)

(1 hr = 3600 s)

Therefore, the average speed of the sprinter is, 34.95 Km/hr

telo118 [61]2 years ago
8 0

The average speed of the sprinter in kilometers per hour is about 35.0 km/h

<h3>Further explanation</h3>

Acceleration is rate of change of velocity.

\large {\boxed {a = \frac{v - u}{t} } }

\large {\boxed {d = \frac{v + u}{2}~t } }

<em>a = acceleration ( m/s² )</em>

<em>v = final velocity ( m/s )</em>

<em>u = initial velocity ( m/s )</em>

<em>t = time taken ( s )</em>

<em>d = distance ( m )</em>

Let us now tackle the problem !

This problem is about Kinematics.

We will solve it in the following way

<u>Given:</u>

distance traveled = d = 200.0 m

time taken = t = 20.6 s

<u>Unknown:</u>

average speed = v = ?

<u>Solution:</u>

v = \frac{d}{t}

v = \frac{200}{20.6}

v = \frac{1000}{103} ~ m/s

Next we will change the units of this speed into km/h.

v = \frac{1000}{103} \times \frac{3600}{1000} ~ km/h

v = \frac{3600}{103}~ km/h

v \approx 35.0 ~ km/h

<h3>Learn more</h3>
  • Velocity of Runner : brainly.com/question/3813437
  • Kinetic Energy : brainly.com/question/692781
  • Acceleration : brainly.com/question/2283922
  • The Speed of Car : brainly.com/question/568302

<h3>Answer details</h3>

Grade: High School

Subject: Physics

Chapter: Kinematics

Keywords: Velocity , Driver , Car , Deceleration , Acceleration , Obstacle , Speed , Time , Rate

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