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iVinArrow [24]
2 years ago
8

an object is shot vertically upward into the air with an initial velocity of 20 m/s? which of the following correctly describes

the velocity and acceleration of the object after 4seconds?

Physics
1 answer:
Drupady [299]2 years ago
5 0

Answer:

Answer is (C)

Explanation:

<u>For</u><u> </u><u>acceleration</u>

• If the motion is vertically, then acceleration is 9.8 m/s²

» Upward motion, acceleration is negative (-9.8)

» Downward motion, acceleration is positive (+9.8)

<u>For</u><u> </u><u>velocity</u>

{ \rm{v = u + gt}} \\ { \rm{v = 20 + ( - 9.8 \times 4)}} \\  { \rm{v =  - 19.2 \: m {s}^{ - 1} }}

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