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3 years ago

A 400 g ball swings in a vertical circle at the end of

Physics

1 answer:

solmaris [256]3 years ago

3 0

Answer:

a = 25 m/s2

Explanation:

A = f/m

A = Speed/Acceleration

F =‘Force

M = Mass

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A 250 kg flatcar 25 m long is moving with a speed of 3.0 m/s along horizontal frictionless rails. A 61 kg worker starts walking

Anna11 [10]

Answer:

x=31.09m

Explanation:

p1=p2

The momentum of flatcar and the momentum of the worker so

The velocity of the worker is:

$m_{f}*v_{f}=m_{w}*v_{w}\\\\v_{f}=\frac{m_{f}*v_{f}}{m_{w}}\\v_{f}=\frac{61kg*3.0\frac{m}{s}}{250kg}\\v_{f}=0.732\frac{m}{s}$

The total motion has a total velocity and is

$Vt=v_{w}+v_{f}\\Vt=0.732\frac{m}{s}+3.0\frac{m}{s}\\Vt=3.732\frac{m}{s}$

The time the worker take walking is

$t=\frac{x}{v_{w}}\\t=\frac{25m}{3\frac{m}{s}}=8.33s$

Now the total time and the total velocity determinate the motion of tha flatcar how far has moved

$x=t*Vt\\x=8.33s*3.732\frac{m}{s} \\x=31.09m$

5 0

3 years ago

We would like to use the relation V(t)=I(t)R to find the voltage and current in the circuit as functions of time. To do so, we u

Delvig [45]

Answer:

Explanation:

The explanation or solution is given in the attach document

7 0

4 years ago

What can happen to the downhill toe of a slump during wet weather or times when snow is melting? ANSWER The toe can turn into a

jek_recluse [69]

Answer:

Option C

The toe can become an earthflow.

Explanation:

During wet weather especially winter season when snow is melting, the downhill toe of a slump is likely to become earthflow. It's incorrect to say that the toe turns into rock avalanche neither can the toe collapse and be deposited as a talus at the base of the slope. Despite the melting ice making clay sticky, the toe can't stop due to continued mass wasting that occurs. Therefore, the right answer is option C, <u>The toe can become an earthflow</u>

5 0

4 years ago

Please help fast

vaieri [72.5K]

D.sound insulators prevent from being transmitted better than elastic solids

Explanation:

The correct option from the given choices is that, sound insulators prevent sound from being transmitted better than elastic solids.

Sound is a form of wave that transmits energy from one point to another.

This wave form is a longitudinal wave in nature.

During the propagation of sound, it requires a material medium to move.

Sound insulators are special materials designed not to transmit sound energy.

Such materials cuts off sound. They are better than elastic solids in preventing sound transmission.

learn more:

Sound wave brainly.com/question/3619541

#learnwithBrainly

8 0

4 years ago

You watch a distant lady driving nails into her front porch at a regular rate of 1 stroke per second. You hear the sound of the

Afina-wow [57]

Answer:

340 meters

Explanation:

For this we have to use the formula of constant velocity motion:

$d=v*t\\where:\\d=distance\\v=velocity\\t=time$

Because you hear the blows exactly 1 per second. And you hear only one blow after she finished, the sound takes one second to get to you.

$d=340(m/s)*(1(s))=340m$

4 0

3 years ago