35) A projectile is fired from the ground with a speed of 32 m/s, 68° above the

Question

35) A projectile is fired from the ground with a speed of 32 m/s, 68° above the horizontal. What is the projectile's maximum height? The maximum height is _____ m.

34) A stone is dropped from a building 54 m high. How long will it take the stone to reach the ground? It will take ______ s.

33) An airplane speeds up from 131 m/s to 218 m/s in 11.6 s. During this time, its acceleration is constant. During this interval, the airplane travels-----------m

32) The vector M shown below has components Mx=223 km, My=109 km. Calculate the angle

Explanation / Answer

Number 35)

Apply vf2 = vo2 + 2ad

0 = (322)(sin268) + 2(-9.8)(d)

d = 44.9 m

Number 34)

Apply d = vot + .5at2

54 = 0 + .5(9.8)(t2)

t = 3.32 sec

Number 33)

Apply d = .5(vf + vo)(t)

d = .5(131 + 218)(11.6)

d = 2024.2 m

Number 32)

tan(angle) = My/Mx

tan(angle) = 109/223

angle = 26.0o

Number 31)

NetTension, by the Pythagorean Theorem

Net2 = (130)2 + (910)2

Net = 919.2 N

Number 29)

(18 km/sec) times (1mile/1.60934 km) times (3600 sec/hr)

That is 40265 mph

Number 28)

23.9 times 2.2 lbs/kg

That is 52.6 lbs

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