1. How far will a mass of 10 kg fall from the top of a
    building 50 meters tall in 5 sec.?
    >50 meters
 2. How long will it take a mass to reach a speed of 70 m/sec.
    if it falls from rest?
    >7 sec.
 3. How long will it take a mass of 80 kg to fall 125 meters
    if it starts from zero speed?
    >5 sec.
 4. If a mass of 10 kg is thrown down at a speed of 25 m/sec. How long
    will it take to reach the ground from a height of 180 meters?
    >4 sec.
 5. If a mass of 10 kg. on top of a building 100 m tall falls 125 m.
    How far does it fall?
    >125 m
 6. If a mass falls from the top of a building 96 m tall and hits
    the ground in 4 seconds, what is the acceleration of gravity?
    >12 nt/kg
 7. What is the gravitational constant on a planet if 3 kg.
    weighs 69 nt.
    >23 nt/kg
 8. What force is needed to give a mass  of 3 kg. an acceleration of
    8 m/sec. squared?
    >24 nt.
 9. A force of 70 nt acts on a mass of 5 kg. What is the acceleration?
    >14 m/sec Sq.
10. What is the weight on earth of a mass of 321.7 kg.?
    >3217 nt
11. If a force of 900 nt pushes a mass of 100 kg upward at
    3 m/sec Sq. What is the acceleration of gravity?
    >6 m/sec. Sq
12. What mass would be accelerated at 6 m/sec. Sq. by a
    force of 9 nt.?
    >1.5 kg.
13. What would the acceleration be on a 9 kg mass if it is
    pushed by a force of 18 nt.?
    >2 m/sec. Sq.
14. What is the kinetic energy of a 10 kg mass moving at 5 m/sec
    at a height of 25 m?
    >125 joules
15. What is the gravitational energy of a 10 kg mass moving at
    5 m/sec at a height of 25 m?
    >2500 joules
16. What is the total mechanical energy of a 10 kg mass moving at
    5 m/sec at a height of 25 m?
    >2625 joules
17. How far can a mass of 10 kg with 500 joules of kinetic energy
    move against a force of 25 nt?
    >20 meters
18. How far must a force of 50 nt push a mass of 10 kg to give it
    500 joules of kinetic energy?
    >10 meters
19. How high can a force of 95 nt lift a mass of 9 kg?
    >NO LIMIT
20. What is the maximum result if vectors of size 10 nt, 20 nt and
    30 nt are added?
    >60 nt.
21. What is the minimum result if vectors of size 10 nt, 20 nt and
    30 nt are added?
    >zero
22. What is the most likely result if perpendicular vectors of
    4 nt and 3 nt are added?
    >5 nt
23. What is the direction of a vector 10 nt N 30 E?
    >N 30 E
24. Which of the following is NOT a vector?
    >mass
25. What is the momentum of a 10 kg mass that is moving
    at 20 m/sec.?
    >200 kg-m/sec.
26. A 10 kg mass moving at 6 m/sec. hit a stationary mass of 5 kg.
    What is the speed of the 5 kg. mass after an elastic collision?
    >8 m/sec.
27. A 10 kg mass moving at 6 m/sec. hit a stationary mass of 5 kg.
    What is the speed of the 10 kg. mass after an elastic collision?
    >2 m/sec.
28. A mass of 10 kg moving at 20 m/sec. is slowed by a force of
    15 nt for 4 sec. What is the new speed?
    >14 m/sec.
29. A mass of 10 kg with 300 joules of kinetic energy is slowed by a
    force of 20 nt for 5 meters. What is the new kinetic energy?
    >200 joules
30. A mass of 10 kg is accelerated from rest by a force of 50 nt for
    10 meters. What is the speed of the 10 kg mass?
    >10 m/sec.
31. A mass of 10 kg is lifted 30 meters from the ground by a force
    120 nt. What is its kinetic energy?
    >600 joules
32. A mass of 10 kg is lifted 30 meters from the ground by a force
    106 nt. What is its speed?
    >6 m/sec.
33. A mass of 10 kg is lifted 30 meters from the ground by a force
    120 nt. What is its gravitational energy?
    >3000 joules
34. A 1000 kg cannon fires a 5 kg cannonball at a speed of 200 m/sec.
    If the cannon is 2 meters long, what is the average force needed?
    >50000 nt.
35. A 0.01 kg bullet moving at 200 m/sec. is stopped in 0.25 meters.
    What average force is needed?
    >800 nt.
36. How far will a 10 kg mass move in 5 sec. at a speed of 20 m/sec.?
    >100 meters
37. On a planet where a mass of 10 kg falls 125 meters in 5 sec. How
    far will a 20 kg mass fall in 5 sec.?
    >125 meters
38. On a planet where a mass of 10 kg falls 125 meters in 5 sec. How
    long will it take for the same mass to fall 500 meters?
    >10 sec.
39. A beam 10 meters long has a mass of 100 kg and has a weight of
    2000 nt hanging 2 meters from one end. Find the forces needed to
    hold up the ends of the beam.
    >900 nt and 2100 nt
40. A beam 10 meters long is resting on a roof with 3 meters of the beam
    hanging off the roof. If the beam has a mass of 90 kg what is the
    largest weight that can hang from the free end of the beam?
    >600 nt
41. A pair of resistors are connected in series. If each resistor is
    8 ohms, what is the combined resistance?
    >16 ohms
42. A pair of resistors are connected in parallel. If each resistor is
    8 ohms, what is the combined resistance?
    >4 ohms
43. What voltage is needed to produce a current of 3 amps in a 15 ohm
    resistor
    >45 volts
44. What current is needed to produce a voltage of 20 volts across a
    40 ohm resistor.
    >0.5 amps
45. What is the power disipation in a 15 ohm resistor if a 3 amp
    current is flowing in it?
    >135 watts
46. What current will disipate 100 watts in a 4 ohm resistor?
    >5 amps
47. What is the centripetal force on a 3 kg moving at 10 m/sec
    around a curve with a radius of 5 meters.
    >60 newtons
48. An object is placed 40  cm from a curved mirror. The image is
    formed 10 cm from the mirror. What is the focal length?
    >8 cm
49. Two resistors are connected in series to a 100 volt battery. If one
    resistor is 15 ohms and the current is 4 amps what is the power in
    other resistor?
    >160 watts
50. What is the sum of 2 and 2 in any math class?
    >4