Given Information:
Angular velocity = ω = 4 rad/s
Angular acceleration = α = 5 rad/s²
Center deceleration = a₀ = 2 m/s
Required Information:
Acceleration of point A at this instant = ?
Answer:
Acceleration of point A at this instant = 5.94 m/s²
Explanation:
Refer to the attached diagram of the question,
The acceleration of point A is given by
a = a₀ + rα - rω²
Where r is the radial distance between the center and point A, a₀ is the deceleration of center, α is the angular acceleration and ω is the angular velocity.
a = -2i + 0.3j*5k - 0.3j*4²
a = -2i + 1.5(j*k) - 0.3j*16
a = -2i + 1.5(-i) - 4.8j
a = -2i - 1.5i - 4.8j
a = -3.5i - 4.8j
The magnitude of acceleration vector is
a = √(-3.5)² + (-4.8)²
a = √35.29
a = 5.94 m/s²
Therefore, the acceleration of point A is 5.94 m/s²
The angle is given by
θ = tan⁻¹(y/x)
θ = tan⁻¹(-4.8/-3.5)
θ = 53.9°
The time constant to reach full charge in an RL circuit is 0.05 ms.
Explanation:
To find the time constant,
The time constant for an RL circuit is defined by τ = L/R.
The given data is
L= 5 H
R= 100 ohms
by using the formula,
τ = L/R
= 5/100
= 0.05 ms
τ = 0.05 ms
Thus, the time constant to reach full charge in an RL circuit is 0.05 ms.
Answer:
I select false because engineers are not the only thing we have, we have scientists doctors mathematicians and much more to give safety standards
Answer:
lol contrates brother......
Answer:
The correct is answer is <u>All of these</u> because:
- walking and running at the same time
- snow and a temperature of 10° Celsius
are all mutually exclusive events.
Explanation:
walking and running at the same time
:
Humans can multi task and engage the brain in coordinating psycho motor, affective and cognitive processes all at once but in the case of activities such as running and walking, it is impossible because, the same organs, neurons and muscles are needed for both activity.
Rain and a cloudless sky
:
Rain occurs after a process of condensation. When the vapor that rises, cools off and form a cloud. Rain happens when the cloud formed dissolves. In other words, rain is clouds in liquid state and there is definitely no rain without a cloud.
Snow and a temperature of 10° Celsius:
Snow is synonymous with extreme cold temperatures usually below 0° Celsius. When it snows, temperature levels ranges from zero degrees to -10° Celsius. Therefore, a temperature of 10° Celsius can never occur when it is snowing.
