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3 years ago

A person walks 60 meters in 1 minute. Then walks 30 meters in 2 minutes. What is thier average speed over the 3 minute walk?

Physics

2 answers:

Gennadij [26K]3 years ago

8 0

Your answer would be 75 meters

valkas [14]3 years ago

3 0

The answer would be 75 meters

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A 730-N man stands in the middle of a frozen pond of radius 5.0 m. He is unable to get to the other side because of a lack of fr

STatiana [176]

Answer:62.11 s

Explanation:

Given

weight of man =730 N

mass of man $m_1=\frac{730}{9.8}=74.48 kg$

radius of pound r=5 m

mass of book $m_2=1.2 kg$

velocity of book $v_2=5 m/s$

let $v_1$ be the velocity of man

conserving momentum

$0=m_1v_1+m_2v_2$

$0=74.48\times v_1+1.2\times 5$

$v_1=\frac{6}{74.48}=0.0805 m/s$

time taken by man to reach south end

$t=\frac{5}{0.0805}=62.11 s$

5 0

3 years ago

Find the force, in Newtons, on a rectangular metal plate with dimensions of 4 m by 8 m that is submerged horizontally in 9 m of

Irina18 [472]

Answer:

$F \approx 3*10^6$

Explanation:

From the question we are told that:

Dimension of plate: $4 m by 8 m$

Depth submerged $d=9m$

Water density $\rho=1000 kg/m3$

Gravity $g=9.8m/s^2$

Generally the equation for Volume is mathematically given by

$V=L*B*d$

$V=4*8*9$

$V=288$

Therefore The mass of Plate is

$m=\rho*V$

$m=1000*288$

$m=288000kg$

Generally the equation for Force on the plate is mathematically given by

F=ma

$F=288000*9.8$

$F=2822400N$

$F=2.8*10^6$

$F \approx 3*10^6$

4 0

3 years ago

a small asteroid of mass 125 kg is orbiting a planet that has a mass of 3.52x 10^13 what is the radial distance between the aste

asambeis [7]

Answer:

r = 2.031 x 10⁶ m = 2031 km

Explanation:

In order for the asteroid to orbit the planet, the centripetal force must be equal to the gravitational force between asteroid and planet:

Centripetal Force = Gravitational Force

mv²/r = GmM/r²

v² = GM/r

r = GM/v²

where,

r = radial distance = ?

G = Universal Gravitational Constant = 6.67 x 10⁻¹¹ N.m²/kg²

M = Mass of Planet = 3.52 x 10¹³ kg

v = tangential speed = 0.034 m/s

Therefore,

r = (6.67 x 10⁻¹¹ N.m²/kg²)(3.52 x 10¹³ kg)/(0.034 m/s)²

7 0

3 years ago

What is latitude 20 degrees north and longitude 65 degrees west?

Marta_Voda [28]

<span>The latitude 20 degrees north and longitude 65 degrees west is in the Atlantic Ocean, north of Puerto. The north coast region of Puerto Rico named "Porta Atlantico" faces the dark blue Atlantic Ocean. On the off chance that you long for unwinding on a tranquil shoreline, losing all sense of direction in the magnificence of waves smashing, and being calmed by their song, you might need to remain on the north drift, lease an auto and investigate.</span>

3 0

3 years ago

Two equally charged tiny spheres of mass 1.0 g are placed 2.0 cm apart. When released, they begin to accelerate away from each o

zhannawk [14.2K]

Answer:

The magnitude of the charge on each sphere is 0.135 μC

Explanation:

Given that,

Mass = 1.0

Distance = 2.0 cm

Acceleration = 414 m/s²

We need to calculate the magnitude of charge