Ask question

Ask question

All categories

Montano1993 [528]

3 years ago

11

a toy of mass 600 is whirled by a child in a horizontal circle using a string of length 2m with a linear speed of 5 m/s determin

e the angular velocity of the toy?

1 answer:

Zepler [3.9K]3 years ago

4 0

Explanation:

angular velocity = velocity/radius

= 5/2

= 2.5 rad/s

You might be interested in

The latitude of any location on earth is the angle formed by the two rays drawn from the center of earth to the location and to

Alina [70]

The distance between city a and city b is 833.345 miles.

We know that

1°=60'

The distance of city a from the initial ray is calculated as

x_a=3960*tan45.46°=4024.101 miles

The distance of city b from the initial ray is calculated as

x_b=3960*tan 38.86°=3190.75 miles

Now the distance between city a and b is equal to

4024.101-3190.75=833.345 miles

This is the vertical distance between the cities.

5 0

3 years ago

When none of the magnetic domains in a material will stay aligned, the material is called __________________?

Kisachek [45]

The material is called paramagnetic or non magnetic material. Opposite to this are materials whose magnetic domains are aligned and possess asmagnetism which is due to its ferrous or iron content.

7 0

3 years ago

A traffic expert wants to estimate the maximum number of cars that can safely travel on a particular road at a given speed. He a

galben [10]

Answer:

<em>Speed s= 19</em>

<u>Explanation:</u>

Take note of the following parameters:

Speed= s,

Number of cars= N,

Number N of cars that can pass a given spot per minute=

N(s)=88s/16+16(s19)2

The principle of differentiation is here:

We let N(s) = N

N = 86s / (17 + 17((s/19)^2))

17N = 86s /(1 + s²/19²)

17N = 361* 86s /(361 + s²)

17N = 31046s /(361 + s²)

Next step;

Differentiate with respect to s

17N = 31046s /(361 + s²)

Remember the quotient rule [u/v]’ = (vu’ - uv’) / v²

Therefore,

u = 31046s =====> du/ds = u’ = 31046

v = (361 + s²) ====>dv/ds = v’ = 2s

17N = 31046s /(361 + s²)

17 dN/ds = ( 31046(361 + s²) - 31046s(2s) ) / (361 + s²)²

The maximum when dN/ds = 0

17 dN/ds = ( 31046(361 + s²) - 31046s(2s) ) / (361 + s²)²

17 * 0 = ( 31046(361 + s²) - 31046s(2s) ) / (361 + s²)²

( 31046(361 + s²) - 31046s(2s) ) = 0

31046 [ (361 + s²) - 2s² ] = 0

31046 (361 - s²) = 0

(361 - s²) = 0

(19 - s)(19 + s) = 0

either s = -19 or s = 19, but s > 0

s = 19

4 0

3 years ago

What are the key differences between stored and conservation of energy?

Irina18 [472]

Stored energy=energy that is stored and may not be used, conservation of energy= saved energy that you can use for other things.

7 0

3 years ago

This lower limb muscle, which attaches to the calcaneus via the calcaneal tendon and plantar flexes the foot when the knee is ex

Naddik [55]

Answer:

Gastrocnemius

Explanation:

The twin, called the gastrocnemius muscle, in relation to the foot causes plantar flexion and leg flexion.

Said muscle is the main engine in the propulsion of the march, bearing large loads. That is why when it comes to practicing sports, it is very helpful to carry out preventive work for gastrocnemius using eccentric loads in addition to using stretching techniques.

This is located on the back of the leg, being the most superficial of the calf. It is located on the soleus muscle and extends from the femoral condyles to the calcaneal tendon.

Condyles are understood as rounded heads that fit in the hole to form the joints.

The twin is a biarticular muscle since its path crosses two joints, that of the knee and ankle.

Its function on the knee is to stabilize the femur, to avoid that there is an imbalance forward in the flexion movements. While, on the ankle acts as an extensor of the same with tendency to investment.

7 0

3 years ago

Read 2 more answers