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Zepler [3.9K]
3 years ago
8

Consider a swimmer that swims a complete round-trip lap of a 50 m long pool in 100 seconds. What is the swimmers average speed a

nd average velocity?
Physics
1 answer:
Neporo4naja [7]3 years ago
5 0

Answer:

The average speed is 1 m/s

The average velocity is 0

Explanation:

Given;

length of the pool, L = 50 m

time taken for the motion, t = 100 s

The total distance = 50 m + 50 m

The total distance = 100 m

The average speed = total distance / total time

                                  = 100 / 100

                                  = 1 m/s

The average velocity = change in displacement / change in time

change in displacement = 50 m - 50 m = 0

The average velocity = 0 / 100

The average velocity = 0

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Explanation:

an impulse results in a change of momentum

FΔt = mΔv

F = m(vf - vi)/t

F = 2000(0 - 32) / 0.5

F = -128,000

|F| = 1.28 x 10⁵ N

5 0
3 years ago
Determine the gravitational force that you exert on another person 1.50 m away. assume that you and the other person are point m
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Given: Universal Gravitational constant = G = 6.67 x 10⁻¹¹ N m²/Kg²
 
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4 0
3 years ago
According to ancient greek thought, what is the difference between violent and natural motion
zzz [600]
Natural was thought to be straight up or straight down and violent was thought to be the result of a push or pull
7 0
3 years ago
Mercury is added to a cylindrical container to a depth d and then the rest of the cylinder is filled with water.
VARVARA [1.3K]

Answer:

0.05m

Explanation:

Density of water = ρ(w) = 1000 kg/ m³ ;  

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Total pressure at bottom of cylinder=1.1atm

Therefore, pressure due to water and mercury =1.1-1 =atm

0.1atm=10130pa

The pressure at the bottom is given by,

ρ(w) x g[0.4 - d] + ρ(m) x g x d  = 10130

1000 x 9.8[0.4 - d] + 13628.95 x 9.8 d = 10130

3924 - 9810d + 133416d= 10130

123606d= 6206

d= 6202/123606

d= 0.05m

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8 0
3 years ago
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2.The speed-time grapher an object at rest is a(n)<br> line at y =
notsponge [240]

Answer:

0

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When y=0, the line is on the x axis, which means that it is at a speed on 0.

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3 years ago
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