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two campers pull a canoe. If the force of friction acting on the canoe is 84 N, then how much work does the two campers need to

sladkih [1.3K]

W=Fs
just multiply them all
84*50 = 4200 J

8 0

3 years ago

A cork has weight mg and density 25% of water’s density. A string is tied around the cork and attached to the bottom of a water-

yuradex [85]

Answer:

Explanation:

Given

Density of Cork $\rho _c=0.25\rho _{water}$

Considering V be the volume of Cork

Buoyant Force will be acting Upward and Weight is acting Downward along with T

Since density of water is more than cork therefore Cork will try to escape out of water but due to tension it will not

we can write as

$\rho _{water}Vg-\rho _Cvg-T=0$

where T=tension

Thus Tension T is

$T=Vg(\rho _{water}-\rho _c)$

Taking $\rho _c$ common

$T=\rho _cVg(\frac{\rho _{water}}{\rho _c}-1)$

$T=mg(\frac{\rho _{water}}{\rho _c}-1)$

$T=mg(4-1)$

$T=3mg$

4 0

3 years ago

A torque acts on a wheel rotating at 19.8 rad/s and increases its angular speed to 23.5 rad/s in 11.2 s. Find the angle through

faltersainse [42]

243 rad is the angle through which the wheel turns during this time.

<h3>What is torque and angular speed?</h3>

Torque is a measure of the force that can cause an object to rotate about an axis.

Angular speed is define as the measuring angle of rotation over a given amount of time.

Mathematically , ω = θ t

From the given question ,

Torque = 19.8 rad/s

ω = 23.5 rad/s

t = 11.2 s

We get the equation,

$\frac{ 19.8 +23.5}{2} * 11.2$

= 243 rad

Learn more about Angular momentum here:

brainly.com/question/15104254

#SPJ1

7 0

2 years ago

A spaceship is moving past us at a speed close to the speed of light. how would we view time (clocks) on the spaceship as it goe

SVEN [57.7K]

The clocks on the spaceship move more slowly than ours do.

<h3>What use does a spaceship serve?</h3>

A spaceship is a machine or vehicle built to travel through space.

Spacecraft are a form of artificial satellite used for a wide range of tasks, such as communications, Earth observation, meteorology, navigation, space colonization, planetary exploration, and cargo and person transfer.

<h3>What is a spaceship used for?</h3>

A launch vehicle from Earth can launch a spaceship, which is made to go in space.

In order to complete a mission—with or without people—and then return to Earth, it may carry a payload. building up.

<h3>How many spacecraft have traveled there?</h3>

Since humankind first started exploring beyond Earth's atmosphere in 1958, more than 250 robotic spacecraft—and 24 humans—have traveled into space.

learn more about time on spaceship here

<u>brainly.com/question/15992164</u>

#SPJ4

8 0

2 years ago

Riders in a carnival ride stand with their backs against the wall of a circular room of diameter

Veseljchak [2.6K]

Answer:

option C

Explanation:

given,

diameter of circular room = 8 m

rotational velocity of the rider = 45 rev/min

= $45 \times \dfrac{2\pi}{60}$

=4.712 rad/s

here in this case normal force is equal to centripetal force

N = m r ω²

N = m x 4 x 4.712²

N = 88.83m

frictional force = μ N

= 88.83m x μ

now, for the body to not to slide

gravity force is equal to frictional force

m g = 88.83 m x μ

g = 88.83 x μ

9.8 = 88.83 x μ

μ = 0.11

hence, the correct answer is option C

6 0

4 years ago

Plss helpp plssssss ​

Plss helpp plssssss