A projectile is thrown from the top of a building with an initial velocity of 30 m/s in the horizontal direction. If the top of the building is 30 m above the ground, how fast will the projectile be moving just before it strikes the ground?

a. 35 m/s
b. 39 m/s
c. 31 m/s
d. 43 m/s
e. 54 m/s


b

Physics & Space Science

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A. 9.9 cm B. 9.0 cm C. 15 cm D. 11 cm E. 13 cm

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What is the approximate average temperature of the Sun's surface?

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An 8.0-kg object rests on the floor of an elevator which is accelerating downward at a rate of 1.3 m/s2 . What is the magnitude of the force the object exerts on the floor of the elevator?

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At the time of the winter solstice (the start of winter), the Sun is

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