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Nutka1998 [239]
3 years ago
13

A stone tied to a string is made to revolve in a

Physics
1 answer:
tia_tia [17]3 years ago
3 0

Answer:

<em>The tangential velocity is 8 m/s</em>

Explanation:

<u>Uniform Circular Motion</u>

It can be described as the motion of an object in a circle at a constant speed.

As an object moves in a circle, it continually changes its direction.

If the radius of the circle is r and the angular speed is w, then the tangential velocity is:

v = w.r

The stone is revolving in a circle of radius r=4 m with an angular speed of w=2 rad/s. The tangential velocity is:

v = 2 rad/s * 4 m

v = 8 m/s

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4 years ago
In order to remove water from a flooded basement, two pumps, each rated at 45 gallons per minute, are used. After half an hour,
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Answer:

4050 gallons

Explanation:

In first half and hour both pumps are working property . There for it give, 45

gallons per minute . Half and hour is equal to 30 minutes.After one pump was broken only one pump is working 30 minutes .

For 1st 30 minutes ,( 2 pumps are working )

Gallons = 45 * 30 *2 = 2700 gallons

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8 0
3 years ago
One end of a 7-cm-long spring is attached to the ceiling. When a 5.4 kg mass is hung from the other end, the spring is stretched
mash [69]

Answer:

2.63 cm

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Since F is gm but taking the given mass to be F

c=\frac {5.4 kg}{4.3 cm}=1.2558139534883720930232558139534883720930

By substitution now considering F to be 3.3 kg

y=\frac {3.3 kg}{1.2558139534883720930232558139534883720930}=2.6277777777777 cm\approx 2.63 cm

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4 years ago
Which of the following describes the difference between the classes of levers?
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<span>the placement of the fulcrum</span>
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sdas [7]

There are no options here. Could you provide the different answers?

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