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mina [271]
3 years ago
10

Please help me......

Physics
1 answer:
snow_tiger [21]3 years ago
6 0
A. The statement is true
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An 80-kg bungee jumper jumps off a bridge. Rubber bungee cords act as a large spring attaching the jumper to the bridge. A bear
inysia [295]

Answer:

The force is F_b =  216 \  N

Explanation:

From the question we are told that

   The  mass of the bungee jumper is  m  = 80 kg

    The spring constant is  k =  20 \  N/ m

    The extension of the rubber bungee cords is  x = 50 m

Generally the weight of the jumper is

      W =  m *  g

=>   W =  80 *  9.8

=>   tex]W =  784  \  N  [/tex]

Generally  the returning force of the rubber bungee cords is mathematically represented as

      F  =  k  *  x

=>     F  =  20   * 50

=>     F  =  1000 \  N

The force to be applied by the bear is

    F_b =  F -  W

=>    F_b =  100 -  784

=>  F_b =  216 \  N

6 0
3 years ago
Anything that can make an object with mass move is called (2 points)
masha68 [24]
The answer is:  [D]:  "force".
________________________________________
Note the formula:  " F = ma"  ;  {"Force = mass * acceleration"}.
______________________________________________________

5 0
3 years ago
Read 2 more answers
Two identical spheres carry charges of +0.6 coulomb and -0.2 coulomb, respectively. If these spheres touch, the resulting charge
masya89 [10]

Answer:

2. +0.2 C

Explanation:

When the two spheres touch, the total charge will be redistributed such that the two spheres are at same potential:

V_1 = V_2

The potential can be rewritten as ratio between the charge on the sphere (Q) and the capacitance of the sphere (C):

\frac{Q_1}{C_1}=\frac{Q_2}{C_2}

Since the two spheres are identical, they have same capacitance:

C_1 =C_2=C

So we can write

\frac{Q_1}{C}=\frac{Q_2}{C}

Q_1=Q_2

And since the total charge is

Q=+0.6 C-0.2 C=+0.4 C

And this charge will be redistributed equally on the two spheres (Q_1 = Q_2), we have

Q_1 = Q_2 = \frac{Q}{2}=\frac{+0.4 C}{2}=+0.2 C

5 0
4 years ago
If a car travels down the highway at a constant speed, are the forces acting on the car balanced or unbalanced?
Pachacha [2.7K]
<span> Balanced. If not so, then the car cannot move with uniform speed. The frictional force is balanced by the force exerted by the engine. </span>
3 0
3 years ago
which would be a better predictor of increase in force of contraction, change in semg amplitude of spikes or change in semg freq
zaharov [31]

The better predictor of increase in force of contraction, change in semg amplitude of spikes.

<h3>What is force?</h3>

A force in physics is an effect that has the power to alter an object's motion. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

Given that in the question the  better predictor of increase in force of contraction, change in semg amplitude of spikes or change in semg frequency of spikes.

The better predictor of increase in force of contraction, change in semg amplitude of spikes.

To learn more about force refer to the link:

brainly.com/question/13191643

#SPJ1

7 0
1 year ago
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