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RoseWind [281]
2 years ago
13

A car travels 10.0 meters north in 9.0 seconds. The car then turns around and travels 5.0 meters south in 8.0 seconds. What is t

he magnitude of the average velocity of the car during this time interval
Physics
1 answer:
son4ous [18]2 years ago
3 0

Magnitude of the average velocity is 0.3 m/s.

To find the answer, we need to know about average velocity.

<h3>What's the average velocity?</h3>
  • Average velocity of an object is given as the ratio of displacement of the object and time.
  • Mathematically, average velocity= displacement / time
<h3>What's the average velocity of the car travels 10.0 meters north in 9.0 seconds then turns around and travels 5.0 meters south in 8.0 seconds?</h3>
  • Here the displacement of the car = 10m - 5m = 5m
  • Time = 9+8= 17s
  • Average velocity= 5/17 = 0.3 m/s

Thus, we can conclude that the average velocity is 0.3 m/s.

Learn more about the average velocity here:

brainly.com/question/6504879

#SPJ4

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You throw a ball with a speed of 25.0 m/s at an angle of 40.0â—¦ above the horizontal directly toward a wall. The wall is 22.0 m
Alina [70]

The ball takes about 1.15 seconds to reach the wall

<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 Projectile Motion

<u>Given:</u>

initial speed = u = 25 m/s

angle of speed = θ = 40.0°

horizontal distance = x = 22.0 m

<u>Unknown:</u>

time taken by the ball = t = ?

<u>Solution:</u>

<em>We will use this following formula to find the time taken by the ball to reach the wall:</em>

x = u_x t

x = u \cos \theta ~t

22 = 25 \cos 40^o ~t

t = 22 \div ( 25 \cos 40^o )

t \approx 1.15 \texttt { seconds}

\texttt{ }

<h2>Conclusion :</h2>

The ball takes about 1.15 seconds to reach the wall

\texttt{ }

<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 , Projectile , Motion , Horizontal , Vertical , Release , Point , Ball , Wall

7 0
3 years ago
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One of the best candidates for a black hole is found in the binary system called A0620-0090. The two objects in the binary syste
Darya [45]

Answer:

One of the best candidates for a black hole is found in the binary system called A0620-0090. The two objects in the binary system are an orange star, V616 Monocerotis, and a compact object believed to be a black hole. The orbital period of A0620-0090 is 7.75hours, the mass of V616 Monocerotis is estimated to be .67 times the mass of the sun, and the mass of the black hole is estimated to be 3.8 times the mass of the sun. Assuming that the orbits are circular, find the radius of the orbit of the orange star.

Explanation:

6 0
3 years ago
A horizontal platform in the shape of a circular disk rotates on a frictionless bearing about a vertical axle through the center
uranmaximum [27]

Answer:

4.36 rad/s

Explanation:

Radius of platform r = 2.97 m

rotational inertia I = 358 kg·m^2

Initial angular speed w = 1.96 rad/s

Mass of student m = 69.5 kg

Rotational inertia of student at the rim = mr^2 = 69.5 x 2.97^2 = 613.05 kg.m^2

Therefore initial rotational momentum of system = w( Ip + Is)

= 1.96 x (358 + 613.05)

= 1903.258 kg.rad.m^2/s

When she walks to a radius of 1.06 m

I = mr^2 = 69.5 x 1.06^2 = 78.09 kg·m^2

Rotational momentuem of system = w(358 + 78.09) = 436.09w

Due to conservation of momentum, we equate both momenta

436.09w = 1903.258

w = 4.36 rad/s

7 0
3 years ago
The best method for separating an oil and water mixture would be _____.
Mice21 [21]

Answer:

The answer is density

Explanation:

8 0
3 years ago
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A bicycle rider increases his speed from 5 m/s to 15 m/s in while accelerating at 2.5 m/s2. How long does this take ?
Olegator [25]

Answer:

4 seconds

Explanation:

Average acceleration is change in velocity over change in time:

a = Δv / Δt

Δt = Δv / a

Δt = (15 m/s - 5 m/s) / 2.5 m/s²

Δt = 4 s

3 0
4 years ago
Read 2 more answers
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