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svet-max [94.6K]
3 years ago
5

A 53 kg gymnast applies a vertical ground reaction force of 1,080 N at 0.13 m behind the center of mass during a forward somersa

ult. Assume she is facing the right. What is the torque generated about the center of mass
Physics
1 answer:
Dima020 [189]3 years ago
7 0

Answer:

Torque is 140.4 N-m.

Explanation:

Mass of the gymnast, m = 53 kg

Vertical force acting on the gymnast, F = 1080 N

Distance, r = 0.13 m behind the center of mass during a forward somersault. We need to find the torque generated about the center of mass. The force is acting behind the center of mass. F = -1080 N

Torque is given by :

\tau=F\times r\\\\\tau=-1080\times 0.13\\\\\tau=-140.4\ N-m

So, the torque generated about the center of mass is 140.4 N-m.

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A block slides down a frictionless plane that makes an angle of 24.0° with the horizontal. What is the
irga5000 [103]

Answer:

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a = 9.8 sin 24 = 3.99 m/sec^2

7 0
2 years ago
Let's take two balls, each of radius 0.1 meters and charge them each to 3 microCoulombs. Then, let's put them on a flat surface
salantis [7]

Explanation:

First, we will calculate the electric potential energy of two charges at a distance R as follows.

                   R = 2r

                      = 2 \times 0.1 m

                      = 0.2 m

where,    R = separation between center's of both Q's. Hence, the potential energy will be calculated as follows.

                U = \frac{k \times Q \times Q}{R}

                    = \frac{8.98 \times 10^{9} \times (3 \times 10^{-6} C)^{2}}{0.1}

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As, both the charges are coming towards each other with the same energy so there will occur equal sharing of electric potential energy between these two charges.

Therefore, when these charges touch each other then they used to posses maximum kinetic energy, that is, \frac{U}{2}.

Hence,   K.E = \frac{U}{2}

                     = \frac{0.081}{2}

                     = 0.0405 J

Now, we will calculate the speed of balls as follows.

                 V = \sqrt{\sqrt{\frac{2 \times K.E}{m}}

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                     = 0.142 m/s

Therefore, we can conclude that final speed of one of the balls is 0.142 m/s.

6 0
3 years ago
How speed and position affect the energy possess by an object?​
Svetllana [295]

Answer:

more speed means that an object has more energy, now if an object's place is something such as a hill, the potential energy will increase meaning an object will have more speed and acceleration. this is because you have the earth's gravity helping you out when the object goes downhill, giving it the higher potential energy  

4 0
3 years ago
A block measure 10 cm by 10 cm by 5 cm , what is it’s volume
Lina20 [59]
I think it is 500 cm. Hope I helped!
5 0
3 years ago
70.5
ra1l [238]

Answer:5000000000hertz

Explanation:

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Frequency=velocity/wavelength

Frequency=(3×10^8)÷0.06

Frequency=5000000000 hertz

5 0
3 years ago
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