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faltersainse [42]
3 years ago
11

A boy, standing at point O, is whirling a ball on a string over his head. After several whirls, he lets go of the string and the

ball travels in a straight line. Describe the velocity of the ball in both situations: whirling overhead and being let go.
Physics
2 answers:
allsm [11]3 years ago
8 0

D)While whirling overhead, the velocity changes. Moving in a straight line, the velocity does not change.

kirza4 [7]3 years ago
4 0
While the ball is <span>whirling overhead it is moving in a circle. It has circular velocity. More often used term is angular velocity. This comes from the fact that ball travels some angle during some time.

When it is let go ball travels in a straight line. It has linear velocity. Word "linear" means "straight".</span>
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A car travels 200km in 3.0 hours. Determine the average velocity of the car
Masja [62]

Answer:

<h2>66.67 km/hr</h2>

Explanation:

The average velocity of the car can be found by using the formula

a =  \frac{d}{t }  \\

d is the distance

t is the time taken

From the question we have

a =  \frac{200}{3}  \\  = 66.66666...

We have the final answer as

<h3>66.67 km/hr</h3>

Hope this helps you

4 0
3 years ago
During a particular time interval, the displacement of an object is equal to zero. Must the distance traveled by this object als
Gnom [1K]

Answer: No, we can have a displacement equal to 0 while the distance traveled is different than zero.

Explanation:

Ok, let's write the definitions:

Displacement: The displacement is equal to the difference between the final position and the initial position.

Distance traveled: Total distance that you moved.

So, for example, if at t = 0s, you are in your house, then you go to the store, and then you return to your house, we have:

The displacement is equal to zero, because the initial position is your house and the final position is also your house, so the displacement is zero.

But the distance traveled is not zero, because you went from you traveled the distance from your house to the store two times.

So no, we can have a displacement equal to zero, but a distance traveled different than zero.

3 0
3 years ago
When light propagates from a material with a given index of refraction into a material with a smaller index of refraction, the s
Ket [755]
Hope this can help u
7 0
3 years ago
The diagram below shows a boat moving north in a river at 3m/s while the current in the river moves south at 1 m/s.
salantis [7]

Answer it will move slower:

Explanation: cause the force that’s opposite of it

4 0
2 years ago
A person using an oxygen mask is breathing air that is 33% oxygen. what is the partial pressure of the o2, when the air pressure
yawa3891 [41]
The partial pressure of the O2 is 36.3 kiloPascal when the air pressure in the mask is 110 kiloPascal based on the isotherm relation. This problem can be solved by using the isotherm relation equation which stated as Vx/Vtot = px/ptot, where V represents volume, p represents the pressure, x represents the partial gas, and tot represents the total gas<span>. Calculation: 33/100 = px/110 --> px = 36.3</span>
5 0
3 years ago
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