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andrew-mc [135]
3 years ago
13

A ball is tossed vertically upward. When it reaches its highest point (before falling back downward) Group of answer choices the

velocity is zero, the acceleration is directed downward, and the force of gravity acting on the ball is directed downward. the velocity is zero, the acceleration is zero, and the force of gravity acting on the ball is zero. the velocity is zero, the acceleration is zero, and the force of gravity acting on the ball is directed downward. the velocity and acceleration reverse direction, but the force of gravity on the ball remains downward. the velocity, acceleration, and the force of gravity on the ball all reverse direction.
Physics
1 answer:
nignag [31]3 years ago
7 0

Answer:

the velocity is zero, the acceleration is directed downward, and the force of gravity acting on the ball is directed downward

Explanation:

Is this exercise in kinematics

          v = v₀ - g t

where g is the acceleration of the ball, which is created by the attraction of the ball to the Earth.

At the highest point

velocity must be zero.

The acceleration depends on the Earth therefore it is constant at this point and with a downward direction.

The force of the earth on the ball is towards the center of the Earth, that is, down

all other alternatives are wrong

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Do Small objects exert no gravitational force ? True or false
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Which cells or organs are considered to be part of both the immune and lymphatic systems? Select all that apply.
Leviafan [203]

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lymph nodes

tonsils and adenoids

thymus

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-Lymph nodes are glands that take care of filtering the fluid that goes through the lympathic system and are also important for the functioning of the immune system.

-Capillaries are blood vessels that connect the veins and arteries and are part of the circulatory system.

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According to this, cells or organs that are considered to be part of both the immune and lymphatic systems are:

lymph nodes

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thymus

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