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. A square piece of alumininum with as mass of 5.4 has a l length of 2 em and a thickness of 5 mm. What is the density of the piece of aluminium in·[/ A ball is thrown into the air with a velocity of Sm/s from on top of a 36 m building. How long does it take the ball to hit the ground?

10. If Samantha ran a distance of 10 m in a direction 30 north of east in 5 s, and then, a distance of 6 m southwest 2 s later, what is her average velocity in rectangular form (or component form)?

1 which of the following is the negation of the vector 12 cmi +0 cm」 a) (12 cm, 0) c) (12 cm, 180) b) (12 cm, 90) d) (12 c, 180) 2. Which of the following is the vector (S cm, 60) in rectangular coordinates a) 21 V3 i + 4 j c) Si +0j b) 4V2i + 42j d) 4i+ 4v3j 3. The velocity of a projectile at its highest point is always b Positive a Negative c Zero d Equal to the initial velocity 4. Circle all scalar quantities a) time c) acceleration 0 speed @ displacement

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Soluion Volum 12 mass, 5. 2. 2Ve loa K..ne, m ohe 2. e ,s넘 녀.hr-12cm, 30。 2 C) 乙ero 2

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