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sukhopar [10]
3 years ago
12

A helicopter flying west begins experiencing an acceleration of 3m/s2 east. Will the magnitude of its velocity increase or decre

ase?
Physics
1 answer:
Rama09 [41]3 years ago
3 0
The acceleration measures the change in velocity.

Since the acceleration is in the direction opposite to the speed, the velocity eastwards will decrease : its magnitude will first decrease, then it reach 0 m/s, then finally it will increase again.
You might be interested in
The current in a light bulb is 0.835A.How long does it take for a total charge of 1.67 C to pass a point in the wire
adelina 88 [10]

2s

Explanation:

Given parameters:

Current = 0.835A

Quantity of charge = 1.67C

Unknown:

Time taken = ?

Solution:

The quantity of electricity Q in coulombs is the product of the current I and time t.

   Q =  I x t

Q is the quantity of electricity in coulombs

 I is the current

 t is the time taken

   input the values and solve for t;

   1.67 = 0.835 x t

t = \frac{1.67}{0.835}    =   2s

learn more:

Current brainly.com/question/4438943

#learnwithBrainly

5 0
3 years ago
A rolling ball has 8 joules of kinetic energy and is rolling 4m/s. Find it’s mass
Maru [420]

Answer:

m = 1

Explanation:

K.E = 8J

v = 4m/s

m = ?

Now,

K.E = 1÷2mv^2

8 = 1÷2 × m × (4)^2

8 = 1÷2 × m × 16

8 = m × 8

m × 8 = 8

m = 8 ÷ 8 = 1

m = 1

<h3><em><u>VERIFICATION</u></em><em><u>:</u></em></h3>

K.E. = 1÷2mv^2

K.E = 1÷2 × 1 × 4^2

K.E. = 8J

<u>-TheUnknownScientist</u>

4 0
3 years ago
Queremos un cilindro de simple efecto que utilice en su funcionamiento un volumen de aire a presión atmosférica de 13,122 litros
zhuklara [117]

Answer:

1) El diámetro es de aproximadamente 913,987 cm.

2) La fuerza del cilindro es 5576850 kgf

Explanation:

1) Los parámetros dados son;

El volumen del aire = 13,122 litros = 13122000 cm³

La presión de trabajo = 8.5 kgf / cm²

La longitud del cilindro = 20 cm.

Por lo tanto, tenemos;

El área de la base del cilindro = π · r² = 13122000 cm³ / (20 cm) = 656100 cm²

r = √ (656100 / π) ≈ 456,994 cm

El diámetro = 2 × r ≈ 2 × 456.994 ≈ 913.987 cm

El diámetro ≈ 913,987 cm

2) La fuerza del cilindro = El área de la base del cilindro × La presión de trabajo

∴ La fuerza del cilindro = 656100 cm² × 8.5 kgf / cm² = 5576850 kgf

La fuerza del cilindro = 5576850 kgf

3 0
3 years ago
Car travels 40km/hr for half an hour. How far does it travel
Lerok [7]

Answer:

The car traveled, d = 20 Km

Explanation:

Given that,

The speed of the car, v = 40 Km/h

The time taken by the car is, t = 0.5 h

The distance covered by the car for half an hour, d = ?

The relation between the velocity and displacement is given by the formula,

                                       <em>  v = d / t</em>

Therefore,

                                        d = v x t

Substituting the given values in the above equation,

                                         d = 40 Km/h x 0.5 h

                                             = 20 Km

Hence, the distance covered by the car is, d = 10 Km

7 0
3 years ago
An elevator together with its passengers weights 5000 N. At a certain instant, the tension in its supporting cable is 6000 N. De
gayaneshka [121]
We have to forces acting on the system (elevator+passengers):
1) The weight (W=5000 N), acting downward
2) The cable's tension (T=6000 N), acting upward
So, the two forces have opposite direction. The resultant (in upward direction) will be
F=T-W
And for Newton's second law, the resultant of the forces acting on the system causes an acceleration on the system itself, given by
a= \frac{F}{m}
where m is the mass of the system.

So, we need to find F and m.
The resultant of the forces is
F=T-W=6000 N-5000 N=1000 N
To find m, we can use the weight of the system. In fact, the weight of an object is given by
W=mg
where g=9.81 m/s^2. Solving for m, and using W=5000 N, we find
m= \frac{W}{g}= \frac{5000 N}{9.81 m/s^2}=510 kg

and at this point, we can calculate the acceleration of the system (elevator+people):
a= \frac{F}{m}= \frac{1000 N}{510 kg}=1.96 m/s^2
and the acceleration has the same direction of the resultant force, so upward.
8 0
3 years ago
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