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Goshia [24]
1 year ago
8

Please solve the Problem.

Physics
1 answer:
yulyashka [42]1 year ago
4 0

From the calculations, the angular momentum is  10 Kg m^2/s while the new force is 50N.

<h3>What is the angular velocity?</h3>

The angular velocity is defined as the product of the mass, velocity and the radius of the material.

Thus;

L = mvr = 2 Kg * 1m * 5 m/s = 10 Kg m^2/s

b) Given that;

F= Gm^2/r^2

If the distance is halved then the force is reduced by 1/4 thus the new force is 50N.

Learn more about angular momentum:brainly.com/question/15104254

#SPJ1

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In 1990 Walter Arfeuille of Belgium lifted a 281.5-kg object through a distance of 17.1 cm using only his teeth. (a) How much wo
Crank

Answer:

(a). The work done is 472 J.

(b). The force exerted is 2.76 kN.

Explanation:

Given that,

Distance = 17.1 cm

Mass of object = 281.5 kg

(a). We need to calculate the work done

Using formula of work done

W=F_{net}\dotc d

W=mg\cdot d

Where, m = mass

g = acceleration due to gravity

d = distance

Put the value into the formula

W=281.5\times9.8\times17.1\times10^{-2}

W=472\ J

The work done is 472 J.

(b). We need to calculate the force

Using action reaction principle

F=F'

F=mg

Put the value into the formula

F=281.5\times9.8

F=2.76\ kN

The force exerted is 2.76 kN.

Hence, (a). The work done is 472 J.

(b). The force exerted is 2.76 kN.

7 0
2 years ago
A 62.0 kg sprinter starts a race with an acceleration of 1.44 m/s2. If the sprinter accelerates at that rate for 30 m, and then
Dominik [7]

Answer:

The time taken for the race is 17.20 s.

Explanation:

It is given in the problem that a 62.0 kg sprinter starts a race with an acceleration of 1.44 meter per second square.The initial speed of the sprinter is zero as it starts from the rest.

Calculate the final speed of the sprinter.

The expression for the equation of the motion is as follows;

v^{2}-u^{2}= 2as

Here, u is the initial speed, v is the final speed, a is the acceleration and s is the distance.

Put u= 0, s=30 m and a= 1.44 ms^{-2}.

v^{2}-(0)^{2}= 2(1.44)(30)

v= 9.3 m^{-1}

Calculate time taken to cover 30 m distance.

The expression for the equation of motion is as follows;

s=ut+\frac{(1)}{2}at^2

Put u= 0, s=30 m and a= 1.44 ms^{-2}.

30=(0)t+\frac{(1)}{2}(1.44)t^2

t=6.45 s

Calculate the time taken to complete his race.

T= t+t'

Here, t is the time taken to cover 30 m distance and t' is the time taken to cover 100 m distance.

T=6.45+\frac{s'}{v}

Put s= 30 m, v= 9.3 m^{-1} and s'= 100 m.

T=6.45+\frac{(100)}{9.3}

T= 17.20 s

Therefore, the time taken for the race is 17.20 s.

6 0
3 years ago
Due to human demand because of its importance to life, the Earth's most precious resource is 
pychu [463]
The answer is variant C because every living organism needs water to survive. A human can live without water only 6 days, after that period the most important organs start to shut down because of the lack of water.
3 0
2 years ago
Read 2 more answers
A 210-kg woorden raft floats on a lake. When a 75-kg man stands on the raft, it sinks 5.0 cm deeper into the water. When he step
GaryK [48]

Answer:

A: The frequency of the vibration is 1.3329 Hz

B: The total energy of the vibration is  18.39375 J

Explanation:

The force of the man his weight causes the raft to sink, and that causes the water to put a larger upward force on the raft.  This extra force is a restoring force, because it is in the opposite direction of the force put on the raft by the man.  Then when the man steps off, the restoring force pushes upward on the raft, and thus the raft – water system acts like a spring, with a spring constant found as follows:

k= F/x = ((75 kg) * (9.81 m/s²))/(5*10^-2 m) = 14715 N/m

The frequency of the vibration is determined by the spring constant (k) and the mass of the raft (210kg).

fn = 1/2π * √(k/m)  = 1/2π * √(14715 / 210) = <u>1.3329 Hz</u>

<u>The frequency of the vibration is 1.3329 Hz</u>

<u />

<u>b) </u>

Since the gravitational potential energy can be ignored, the total energy will be :

Etot = 1/2 k* A² = 1/2 * (14715 )*(0.05)² = 18.39375 J

<u>The total energy of the vibration is  18.39375 J</u>

7 0
2 years ago
How big is the universe I get it only God knows because he created all of it meaning everything.That is real.
deff fn [24]

god is mighty not only did he create the universe but also everything in it

but here's the answer 93 billion light years

7 0
3 years ago
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