Displacement will be zero.
<h3>What is displacement and how is it different from distance?</h3>
Displacement:
- It is the shortest distance between an object's beginning position and ending position.
- The quantity is a vector.
- It may be zero, positive, or negative.
- Displacement may be greater than or equal to distance.
In the given question, we start from one point and finish at the same point around the circular track. Therefore there is no distance between the initial and final points because they are the same. That's why the displacement is zero.
Distance:
- It is the actual path or distance that an object takes to go from its starting point to its finishing point.
- The quantity is a scalar one.
- It cannot be 0 or negative; it must be positive.
- Displacement and distance may be equal.
Learn more about displacement here:
brainly.com/question/14637077
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Answer:
The resultant vector 
is given by ![\vec R = 3.196\,\hat{i}-0.464\,\hat{j}\,\,\,[m]](https://tex.z-dn.net/?f=%5Cvec%20R%20%3D%203.196%5C%2C%5Chat%7Bi%7D-0.464%5C%2C%5Chat%7Bj%7D%5C%2C%5C%2C%5C%2C%5Bm%5D)
.
Explanation:
Let 
and 
, both measured in meters. The resultant vector 
is calculated by sum of components. That is:
(Eq. 1)
The resultant vector is given by .
Answer:
v₀ = 60.38 mi / h
With this stopping distance, the starting speed should have been 60.38 mi/h, which is much higher than the maximum speed allowed.
Explanation:
For this exercise let's start by using Newton's second law
Y axis
N-W = 0
N = W
X axis
fr = m a
the expression for the friction force is
fr = μ N
we substitute
μ mg = m a
μ g = a
calculate us
a = 0.620 9.8
a = 6.076 m / s²
now we can use the kinematics relations
v² = v₀² - 2 a x
suppose v = 0
v₀ = 
Ra 2ax
let's calculate
v₀ = 
v₀ = 27.00 m / s
let's slow down to the english system
v₀ = 27.0 m / s (3.28 ft / 1m) (1 mile / 5280 ft) (3600s / 1h)
v₀ = 60.38 mi / h
With this stopping distance, the starting speed should have been 60.38 mi/h, which is much higher than the maximum speed allowed.
Answer:
f = 7.97 x 10⁶ Hz = 7.97 MHz
Explanation:
The speed of a wave is given by the following formula:
where,
v = speed of the ultrasound wave through human tissue = 1540 m/s
f = frequency of ultrasound wave required = ?
λ = wavelength of ultrasound waves = smallest detail required = 0.193 mm
λ = 0.193 mm = 1.93 x 10⁻⁴ m
Therefore,
<u>f = 7.97 x 10⁶ Hz = 7.97 MHz</u>
Answer:
A _commutator_ is used in a motor to switch the direction of the magnetic field created by the current.
The rotating part of a motor that holds the electromagnets is called the __armature___.
Electric current passes through the _brushes_ and into the electromagnets in an electric motor.
A motor turns _electrical_ energy into _mechanical_ energy.
Explanation:
A commutator, which is a split ring rotary switching device, reverses the direction of the current between the external circuit and the rotor. Reversing the current reverses the magnetic field.
The armature comprises the rotating part of the motor and the electromagnets
A brush is the electrical contact for conducting current through the moving and stationary parts of an electric motor
An electric motor turns electrical energy into mechanical energy.
