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Natali [406]
3 years ago
12

When you whirl a small rubber stopper on a cord in a vertical circle, you find a critical speed at the top for which the tension

in the cord is zero. At this speed. the force of gravity on the object 1S itselfisufficient to supply the necessary centripetal force. How slowly can you swing a 15-g stopper like this so that It will just follow a circle with a radius of m?​
Physics
1 answer:
Sauron [17]3 years ago
6 0

Answer:

  √(9.8/m) radians per second

Explanation:

The centripetal acceleration required for a radius of m is ...

  a = mω²

so, the angular speed required is ...

  ω = √(a/m) =  √(g/m) . . . . . where g is the acceleration due to gravity

  ω = √(9.8/m) . . . radians per second

__

The speed is independent of the mass. For a 1 m radius, the speed is about 29.9 RPM.

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If you have a mass of 15kg , what is your weight on earth?
krek1111 [17]
I believe 33 but im not sure
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3.
Alborosie

Answer:

C

Explanation:

Acceleration is defined as a change in velocity over time. This means that as long as the forces are not zero, the velocity should be changing. The can be negative (as this is negative acceleration also known as deceleration) or positive (known as acceleration). It doesn't matter if they are decimals or fractions.

4 0
3 years ago
Read 2 more answers
You lift a 10-kg box to a height of 1m. How much work do you do on the box when you lift it from the ground? (g= 9.81 m/s2)
Andreyy89

Answer:

98.1 Joule

Explanation:

Solution,

⇒Mass(m)=10kg

⇒Weight(F)=Mg=10×9.81=98.1N

⇒Distance(d)=1m

Now,

Work done=F×d

                  =98.1×1

                  =98.1J

5 0
2 years ago
There are four springs stretched by the same mass.
brilliants [131]

Spring C stretches 100 cm.

Explanation:

The spring constant is simply the stiffness of the spring. The higher the spring constant the more stiff the spring is.

Spring constant shows the force needed to stretch a spring from it's equilibrium position. If a material requires more force to cause it to stretch, it will have a high spring constant.

          According to hooke's law "the force needed to extended an elastic material is directly proportional to its extension"

          F = ke

   k is the spring constant

   e is the extension

We see that the spring that stretches by 100 is the less stiff compared to other springs. It has the smallest spring constant.

Learn more;

Force brainly.com/question/8882476

#learnwithBrainly

8 0
3 years ago
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