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Ber [7]
3 years ago
7

A ball is thrown with a velocity of 35 meters per second at an angle of 30° above the horizontal. which quantity has a magnitude

of zero when the ball is at the highest point in its trajectory?
Physics
1 answer:
enot [183]3 years ago
5 0
The quantity that has a magnitude of zero when the ball is at the highest point in its trajectory is the vertical velocity.

In fact, the motion of the ball consists of two separate motions:
- the horizontal motion, on the x-axis, which is a uniform motion with constant velocity v_x=v_0 cos 30^{\circ}, where v_0=35 m/s
- the vertical motion, on the y-axis, which is a uniformly accelerated motion with constant acceleration g=9.81 m/s^2 directed downwards, and with initial velocity v_y=v_= sin 30^{\circ}. Due to the presence of the acceleration g on the vertical direction (pointing in the opposite direction of the initial vertical velocity), the vertical velocity of the ball decreases as it goes higher, up to a point where it becomes zero and it reverses its direction: when the vertical velocity becomes zero, the ball has reached its maximum height. 
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3 years ago
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musickatia [10]

Answer:

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Action and reaction is encountered as the mouse is walking. The mouse exerts a force on the ground and the ground exerts an equal and opposite reaction force on the mouse.

Explanation:

6 0
2 years ago
A model railroad train travels at a constant speed of 8 cm/s . How far would the train travel in one minute ?
Furkat [3]

Answer:

Answer:

480cm or 0.48m

Explanation:

Given parameter:

Speed of the train = 8cm/s

time of travel = 1minute

Unknown:

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Solution:

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Now to solve for the distance;

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7 0
3 years ago
While on stage introducing the iPhone, Steve jobs walked 3 meters to the right, 9 meters to the left, 7 meters to the right, and
Y_Kistochka [10]

Answer:

Hey

The distance is easy, just add 3+9+7+9.

Answer <em>28m</em>

Distance is not to be confused with displacement (the total distance from your starting point).

<em>Wbob1314</em>

7 0
2 years ago
Which of the following pairs contain a correct match of the scientist and the particle he is credited with discovering?
olga_2 [115]
Both B and C are correct.
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If you need only one answer, I'd pick B, though. 
6 0
3 years ago
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