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OLEGan [10]
3 years ago
6

In a polar coordinate system, the velocity vector can be written as . The term theta with dot on top is called _________________

______ angular velocity transverse velocity radial velocity angular acceleration
Physics
1 answer:
viva [34]3 years ago
7 0

Answer:

I believe it's called rapid growth

Explanation:

that is my answer no matter what

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the friction of water on a boat produces an acceleration of -10m/s^2. if the boat is traveling at 30 m/s and the motor shut off,
tatuchka [14]

Answer:

<em>The boat takes 2.5 seconds to slow down to 5 m/s</em>

Explanation:

<u>Motion With Constant Acceleration</u>

It's a type of motion in which the velocity of an object changes uniformly in time.  The equation that rules the change of velocities is:

v_f=v_o+at\qquad\qquad [1]

Where:

a   = acceleration

vo = initial speed

vf  = final speed

t    = time

Using the equation [1] we can solve for a:

\displaystyle a=\frac{v_f-v_o}{t}

The acceleration produced by the friction of water is a=-10 \ m/s^2 and the boat is initially traveling at v0=30 m/s. When the motor is shut off, the boat will start braking until it stops. We need to find the time it takes to ready the final speed of vf=5 m/s.

Let's solve the above equation for t:

\displaystyle t=\frac{v_f-v_o}{a}

\displaystyle t=\frac{5-30}{-10}

\displaystyle t=\frac{-25}{-10}

t = 2.5 s

The boat takes 2.5 seconds to slow down to 5 m/s

5 0
3 years ago
You are trying to get to class on time using the UCF Shuttle. You are later than usual getting to the stop and see the shuttle p
aivan3 [116]

Answer:

20.1 m/s

Explanation:

Since You are later than usual getting to the stop and see the shuttle pulling away from the stop while you are still 3.9 m behind the bus stop. And In 40.9 m you will reach a barrier and you must catch the shuttle before that point.

Given that the shuttle has a constant acceleration of 4.5 m/s2. 

The total distance to cover is:

Total distance = 40.9 + 3.9 = 44.8 m

Assuming you are starting from rest. Then initial velocity U = 0

Using the 3rd equation of motion to calculate the minimum velocity.

V^2 = U^2 + 2as

V^2 = 0 + 2 × 4.5 × 44.8

V^2 = 403.2

V = sqrt (403.2)

V = 20.1 m/s

Therefore, the minimum velocity you have to run at to catch the bus before it reaches the barrier is 20.1 m/s

4 0
3 years ago
Why does charging by rubbing happens best in dry weather?
navik [9.2K]
Maybe friction..? my best answer.
7 0
4 years ago
A thin rod rotates at a constant angular speed. Consider the tangential speed of each point on the rod for the case when the axi
ASHA 777 [7]

Answer:

    v = R w    

With this expression we see that for each point at different radius the tangential velocity is different

Explanation:

They indicate that the angular velocity is constant, that is

            w = dθ / dt

Where θ is the radius swept angle and t the time taken.

The tangential velocity is linear or

           v = dx / dt

Where x is the distance traveled in time (t)

 

In the definition of radians

          θ = s / R

Where s is the arc traveled and R the radius vector from the pivot point, if the angle is small the arc (s) and the length (x) are almost equal

         θ = x / R

We substitute in the speed equation

         v = d (θ R) / dt

The radius is a constant for each point

         v = R dθ / dt

         v = R w

With this expression we see that for each point at different radius the tangential velocity is different

6 0
3 years ago
Which of the following best explains why electrical wires are usually covered with plastic or rubber
xeze [42]
Because plastic and rubber are insulators.
5 0
4 years ago
Read 2 more answers
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