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geniusboy [140]
3 years ago
5

When an object is turning around, is it also at rest at the point?

Physics
2 answers:
Ganezh [65]3 years ago
8 0

Answer:

yes

Explanation:

Depolarization

AysviL [449]3 years ago
8 0
When an object changes direction, it’s velocity goes to 0 at that point. So the object will also be considered at rest.
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If the sound source is moving then the pitch of the sound will ___________________ to the observer.
Alika [10]

Answer:

Increase

Explanation:

The frequency of sound determines the sound. If the frequency is lower the pitch will be lower. If the frequency is higher the pitch will be higher. This is affected by the motion of the sound source because when a sound source is moving faster the frequency will become higher.

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3 years ago
Hello I want to ask questions about physics
jek_recluse [69]

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3 years ago
A bowling ball of mass m = 1.7 kg drops from a height h = 14.2 m. A semi-circular tube of radius r = 6.2 m rest centered on a sc
marshall27 [118]

Answer:

W_net = mg + 2mgh/r

Explanation:

The forces applied in this motion of the bowling ball are both gravitational and centripetal forces.

Now, gravitational force is; F_g = mg

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Since we want to express the net force in terms of the variables in the statement and we are not given "v", let's find an expression of v with the variables given.

Now, from Newton's equation of motion, at initial velocity of 0, v² = 2gh.

Thus;

F_c = 2mgh/r

Where;

m is ball mass

r is tube radius

h is fall height

Thus, the net force will be;

F_net = F_g + F_c

Now, Net force would be equal to the net weight that will be read on the scale.

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W_net = F_net = F_g + F_c

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8 0
3 years ago
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lana [24]

Answer:

The speed change during the 45-minute trip is 20[mph]

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When we see the speed at the 45 minutes this is 20 [mph] and at the 0 minutes the speed is 0 [mph].

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In the attached image we can see the different figures. In fig 1 we can see the bicycle's speed after 10 minutes when the speed becames constant.

In the fig. 2 we can find the graph when the biker stopped at 30 minutes and took a 15-minute break.

Figures 3 and 4, show the differences when a horizontal line is traced on a position vs time graph, and when the horizontal line is traced in a speed vs time graph.

For fig 3 we can conclude that the body is not moving therefore there is no velocity or acceleration. And for the fig 4, we can realize that the area under the horizontal line represents a displacement during the respective interval of time.

3 0
3 years ago
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