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Maru [420]
4 years ago
14

An object is shot vertically upward into the air with a positive initial velocity. What correctly describes the velocity and acc

eleration of the object at its maximum elevation?
Velocity Acceleration
(A) Positive Positive
(B) Zero Negative
(C) Positive Negative
(D) Zero Zero
(E) Negative Negative
Physics
2 answers:
SashulF [63]4 years ago
8 0

Answer:

B

Explanation:

Have a great day!

GREYUIT [131]4 years ago
3 0

Answer:

option (B)

Explanation:

According to the vector analysis, the upward direction is taken as positive and the downward direction is taken as negative.

Similarly, the rightward direction is taken as positive while the leftward direction is taken as negative.

As the object is hot vertically upwards so the direction of velocity is taken as positive as given in the question.

At the maximum height, the velocity is zero.

The acceleration acting on the object is acceleration due to gravity which is always acting downwards so it is taken as negative.

Thus, option (B) is true.

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If a star is 75 light years away,how long is it before we see the light from that star on Earth ?
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3 0
4 years ago
Read 2 more answers
While a block slides forward 1.35 m, a force pulls back at a 135 direction, doing -17.8 J of work. what is the magnitude of the
Verdich [7]

The magnitude of the force is 18.6 N

Explanation:

The work done by a force on an object is given by

W=Fd cos \theta

where

F is the magnitude of the force

d is the displacement of the object

\theta is the angle between the direction of the force and of the displacement

For the block in this problem, we have

W=-17.8 J is the work done

d = 1.35 m is the displacement of the block

\theta=135^{\circ} is the angle between the force and the displacement

Solving for F, we find the magnitude of the force:

F=\frac{W}{d cos \theta}=\frac{-17.8}{(1.35)(cos 135)}=18.6 N

Learn more about work here:

brainly.com/question/6763771

brainly.com/question/6443626

#LearnwithBrainly

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4 years ago
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