Question # 1 (Multiple Choice) What force is required to give a projectile weighing 450. N an acceleration of 500. m/s^2?

A) 5.6 E 4 N
B) 2.3 E 4 N
C) 1.6 E 4 N
D) 8.7 E 4 N

Question # 2 (Multiple Choice) A plane is flying at 8000. m. If a package is dropped from the plane how fast would the package be traveling when it hits the ground?

A) 205.6 m/s
B) 396.0 m/s
C) 457.8 m/s
D) 120.4 m/s

Question # 3 (Multiple Choice) A projectile is fired into the air and 12.6 seconds later hits the ground. With what speed was the projectile fired into the air?

A) 97.5 m/s
B) 14.6 m/s
C) 61.7 m/s
D) 38.6 m/s

Question # 4 (Multiple Choice) How many kilowatts are required to raise a weight of 25 N a distance of 8.0 m in 2.5 minutes?

A) 1.33 E - 3 kW
B) 2.63 E - 2 kW
C) 1.86 E 2 kW
D) 3.35 E -5 kW

Question # 5 (Multiple Choice) A suitcase is accidentally dropped from an airplane flying at an altitude of 3.2 E 4 m. With what final velocity does it strike the earth? (no air resistance of course)

A) 380 m/s
B) 350 m/s
C) 240 m/s
D) 790 m/s

Question # 6 (Multiple Choice) An elevator in the Empire State Building rises to the 70. floor in 43 seconds. If the height is 900. feet, what horsepower must be developed in order to lift 12 people averaging 160 lb each to this floor?

A) 57 hp
B) 89 hp
C) 63 hp
D) 73 hp

Question # 7 (Multiple Choice) How many seconds does it take a metal ball to drop 200. m from rest?

A) 6.39 s
B) 4.28 s
C) 8.58 s
D) 7.29 s

Question # 8 (Multiple Choice) The mass of a large steel ball is 1200 kg. What power is used in raising it to a height of 30. m if the work is performed in 14 seconds?

A) 2.5 E 4 W
B) 4.5 E 4 W
C) 8.5 E 3 W
D) 9.3 E 4 W

Question # 9 (Multiple Choice) An object weighing 450 pounds strikes the earth with a velocity of 145 ft/s. With what kinetic energy did it strike the earth?

A) 4.6 E 5 ft lb
B) 3.0 E 5 ft lb
C) 2.4 E 4 ft lb
D) 5.1 E 4 ft lb

Question # 10 (Multiple Choice) A projectile is launched at a speed of 24 m/s. The parachute fails and the projectile falls (free fall) back to earth. What is the total time the projectile is in flight?

A) 4.9 s
B) 3.2 s
C) 8.6 s
D) 9.7 s

Question # 11 (Multiple Choice) A toy airplane that is flying at 3.00 m/s speeds up to 19.0 m/s in 2.20 seconds due to a force of 6.95 E 2 N. Using this information what is the mass of the toy?

A) 7.27 g
B) 95.6 g
C) 38.2 g
D) 14.8 g

Question # 12 (Multiple Choice) A plane is traveling at a speed of 250. miles per hour at an altitude of 600. feet. How far before the target must the plane drop an object to insure it hits the target?

A) 6.12 mile
B) 1530 mile
C) 0.425 mile
D) 8.35 mile
E) 1.04 mile