All categories

3 years ago

What is the kinetic energy of a 6 kg and 2 m long thin rod that rotates with angular velocity of 10 rad/s

Physics

1 answer:

Leni [432]3 years ago

6 0

Answer:

1200 J

Explanation:

From the question

K.E = 1/2mv²...................... Equation 1

Where K.E = Kinetic Energy, m = mass of the rod, v = velocity of the rod

But

V = ωr..................... Equation 2

Where ω = angular velocity of the rod, r = radius of the rod.

Substitute equation 2 into equation 1

K.E = 1/2m(ωr)²..................... Equation 3

Given: m = 60 kg, ω = 10 rad/s, r = 2 m

Substitute these values into equation 3

K.E = 1/2(6)(10×2)²

K.E = 3×(20)²

K.E = 3×400

K.E = 1200 J

You might be interested in

Tasks

barxatty [35]

Answer:

NE DIYON INGILIZ MISIN SEN

7 0

3 years ago

The largest salami in the world, made in Norway, was more than 20 m long. If a hungry mouse ran around the salami’s circumferenc

Musya8 [376]

Answer: 0.09 m

Explanation:

Centripetal acceleration in terms of tangential speed is:

$a_c=\frac{v^2_t}{r}$

where r is the radius.

It is given that,

centripetal acceleration of the mouse, $a_c=0.29 m/s^2$

tangential speed , $v_t=0.17m/s$

Radius of salami is:

$r =\frac{(0.17m/s)^2}{0.29 m/s^2}=0.09m$

Thus, the radius of the salami is 0.09 m.

8 0

3 years ago

Help it’s due tomorrow

Sati [7]

Answer:

A., the variables have a direct relationship.

Explanation:

As K rises, L rises.

It's not B. because one isn't rising as the other is lowering.

It's not C. because undefined would be a vertical line.

4 0

3 years ago

As your skateboard coasts uphill, your speed changes from 3 m/s to 1 m/s in

vlada-n [284]

Answer:

$a=-0.33\ m/s^2$

Explanation:

<u>Accelerated Motion</u>

The acceleration of a moving body is defined as the relation of change of speed (or velocity in vector form) with the time taken. The formula is given by

$\displaystyle a=\frac{\Delta v}{t}$

Or, equivalently

$\displaystyle a=\frac{v_f-v_o}{t}$

Where vf and vo are the final and initial speeds respectively. The problem gives us these values: v0 = 3 m/s, vf = 1 m/s, t = 3 seconds. Computing a

$\displaystyle a=\frac{1-3}{3}=-0.33\ m/s^2$

The negative sing of a indicates there is deceleration or decreasing speed

7 0

3 years ago

What adaptation does a wood frog have that enable it to survive in deciduous forest ?

sweet [91]

Wood frogs have this adaptation where they accumulate urea in their bodies and convert their liver glycogen to glucose to act as cryoprotectants. This prevents the formation of ice crystals in their bodies that could cause damage cells during freezing in winter.

5 0

3 years ago

Read 2 more answers