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Volgvan
3 years ago
11

A bicyclist, initially at rest, begins pedaling and gaining speed steadily for 4.00s during which she covers 34.0m. What was her

final speed?
Physics
1 answer:
GalinKa [24]3 years ago
8 0

Answer:

17.0 m s^-1

Explanation:

This question can be answered using suvat equations: (I'm assuming you know what these are)

s = 34.0 m

u = 0

v = ?

a = N/A

t = 4.00s

The only suvat equation that doesn't contain "a" is s = (u+v/2)t.

Make "v" the subject so v = 2s/t.

v = (2 x 34.0)/4.00 = 17 m/s

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tresset_1 [31]

Answer:

Field, In physics, a region in which each point is affected by a force.

Explanation:

4 0
3 years ago
Automobile traveling at 65 mph constant on the road described below. Find rate at which radar must rotate when theta = 15 deg. A
Finger [1]

Answer:

The rate at which radar must rotate is 0.335 rad/s.

Explanation:

Given that,

Velocity = 65 m/h = 29.0576 m/s

Angle = 15°

Suppose, the radius given by

r=(100\cos2\theta)\ m

We need to calculate the rate at which radar must rotate

Using formula of linear velocity

v=r\omega

\omega=\dfrac{v}{r}

Where, v = velocity

r = radius

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\omega=\dfrac{29.0576}{100\cos30}

\omega=0.335\ rad/s

Hence, The rate at which radar must rotate is 0.335 rad/s.

3 0
3 years ago
Someone please help. Describe how electric potential energy, kinetic energy, and work change when two charges of opposite sign a
erik [133]

Answer:

The answer is based on the conservation of energy law; something you should really understand by now.  

For convenience we can hold one of the two charges still; it becomes the frame of reference. And everything we say is in reference to the designated static charge, call it Q.  

So the moving charge, call it q, has total energy TE = PE. It's all potential energy as we start with q not moving.  

It has potential energy because in order to separate q from Q, we had to do work, add energy, on q. And from the COE law, that work added is converted into PE.  

It's a bit like lifting something off the ground. That's work and it becomes GPE. So there's some work, in separating the two charges in the first place.  

But there's more.  

Now we let q go. As opposites attract, q is pulled to Q. And that force from Q is working on q, force over distance. Which means the potential energy q started with is being converted into kinetic energy. q is accelerating and picking up speed.  

And there's more work, done by the EMF on charge q. That converts the PE into KE and the q charge smashes into Q with some kinetic energy.

5 0
3 years ago
Ang larong Latin at Sisiw ay________________________.
brilliants [131]

larong pinoy

Explanation:

ito ay larong Pinoy

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3 years ago
What are the causes of season change in the earth​
fredd [130]

Answer:

Earth's tilted axis causes the seasons.

Explanation:

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3 years ago
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