Name ____________________ Date ____________ Block ___
Physics Final Study Guide part 2
Vectors, 2-D Motion, Projectile Motion
Be sure to look over the notes and homework assignments from these topics.
1. What is trajectory? What is a projectile?
2. When an object is falling under the sole influence of gravity it is ______
3. What is a scalar value? Vector?
4. What are the two ways to read a vector’s direction? Can you do both ways?
5. How do you add vectors graphically?
6. How do you add vectors analytically?
7. When adding vectors does it matter what order you add them?
8. What three things affect the trajectory of a projectile?
9. Acceleration due to gravity is independent of what three things? What doesn’t affect it?
10. For an object moving along a trajectory, the horizontal velocity of the object __________
as the position changes.
11. What is the vertical change in position of an object that is dropped and that of an identical object that is
thrown horizontally from the same height?
12. In trajectory motion, the initial horizontal velocity is _____ the final horizontal velocity.
13. What is the total displacement experienced by an object thrown straight up into the air and caught at the
original release point?
14. Consider a tennis ball thrown straight up. Does it take more time for the ball to travel upward or
downward?
15. Once an object is launched, what is the only force that affects its motion?
16. If the projectile is released with a horizontal velocity of 10.0 m/s, what is its horizontal velocity
at the highest point of its trajectory?
17. An airplane traveling at constant velocity drops a bomb. Where is the airplane when the bomb
hits the ground?
18. Which hits the ground first if they start at the same height: a dropped ball or a ball launched with a
horizontal velocity?
19. For projectiles launched at angles, when do they reach their highest point?
20. A tennis ball is thrown straight up into the air with an initial velocity of 40 m/s. What is it’s velocity at the
top of its path?
21. A tennis ball is thrown straight up into the air with an initial velocity of 40 m/s. What is it’s velocity when
it comes back to the same initial release point?
22. A tennis ball is thrown straight up into the air with an initial velocity of 40 m/s. What is the ball’s
acceleration at the top of its path?
23. A tennis ball is thrown straight up into the air with an initial velocity of 40 m/s. What is it’s acceleration
when it comes back to the same initial release point?
24. A right-angle triangle has an x-component of -25m and a y-component of 35m. What is the magnitude of
the hypotenuse?
25. A right-angle triangle has a x-component of -25m and a y-component of 33m. Using easting convention,
what is the angle of Θ? (remember: Θ is always the angle where you began your drawing)
26. A truck drives up a hill with a 15° incline. If the truck has a constant speed of 20m/s what is the horizontal
component of the truck’s velocity?
27. A truck drives up a hill with a 15° incline. If the truck has a constant speed of 20m/s what is the vertical
component of the truck’s velocity?
28. A car traveling at 10m/s accelerates at the rate of .6m/s2 for an interval of 5s. What is the finial velocity?
29. A car accelerates from rest to 5m/s2. What is the velocity at the end of 3s?
30. A car accelerates from rest to 5m/s2. What is the total displacement after 3s?
31. A worker drops a wrench from the top of a tower 100m tall. What is the velocity when the wrench strikes
the ground?
32. A worker drops a wrench from the top of a tower 100m tall. How long does it take for the wrench to strikes
the ground?
33. (long one) Matt is practicing to become a NFL kicker. He kicks the ball with an initial velocity of 30m/s
with an angle of 40° down the field. How long is the football in the air? How far does the football travel
horizontally? What is the maximum height the football travels?
34. (long one) A cannon fired a cannon ball horizontally off a cliff with a velocity of 50.0 m/s . The cliff was
60.0 m high. How long was the cannon ball in the air? How far did it go horizontally? What was the finial
velocity in the y direction? (draw “the chart” if needed)
35. (long one) A pirate follows a treasure map. He travels for 10m in a 30 west of north direction. He then
walks directly due north for 15m. Finally he turns 20 north of east and walks 5m to his treasure. What is
the resultant vector of his total path. Be sure to include it’s magnitude and angle.
Force, Work, Energy and Power
36. What is equilibrium?
37. What is friction?
38. A 20-N force and a 40-N force act in the same direction on an object. What is the net force on the object?
39. What are Newton’s 3 laws? What are examples of each?
40. A boxer preparing for a fight punches a sheet of paper. Which experience the greater force?
41. What is terminal velocity?
42. What is the acceleration of a 200 kg car if it is pushed with a 5 N force?
43. If an object is at rest, can we conclude that no external forces are acting on it?
44. An object thrown into the air stops at the highest point in it’s path. Is it in equilibrium?
45. Four forces act on a hot-air balloon. From the south 400N, from the north 5000N from the west 1000N,
from the east 900N. What is the magnitude of the resultant force on the balloon.
46. What net force is required to give a 25kg suitcase an acceleration of 3 m/s2 to the right?
47. An 2000 kg car is moving to the right at a constant speed of 2 m/s. What is the net force on the car?
48. Which is usually greater, the maximum force of static friction or the force of kinetic friction?
49. A 5 kg bag of groceries is in equilibrium on an incline of angle Θ = 20°. What is the magnitude of the
normal force on the bag.
50. If Nellie Newton pushes an object with twice the force for twice the distance, she does _________.
51. Which type of friction opposes the start of motion?
52. An arrow in a bow has 100 J of potential energy. Assuming no loss of energy due to heat, how much
kinetic energy will it have after it has been shot?
53. Which requires more work: lifting a 50-kg sack vertically 2 meters or lifting a 25-kg sack vertically 4
meters?
54. Can the gravitational potential energy associated with an object be negative? Explain.
55. A ball is thrown into the air with an initial 50J of kinetic energy, which is transformed to gravitational
potential energy at the top of its trajectory. When it returns to its original level, ignoring air resistance, its
kinetic energy is __________.
56. How many joules of work are done on an object when a force of 15 N pushes it 10 m?
57. How much power is required to do 75 J of work on an object in 2 seconds?
58. How much work is done by gravity on a 25 N rock that you carry horizontally across a 10m room?
59. How much work is done by gravity on a 25-N rock that you lift 10 m?
60. Mechanical energy is conserved in the absence of what?
61. What is the difference between Mechanical and Non-Mechanical energy? What are examples of each?
62. A car is pulled up a ramp by a cable that is attached at the top of the ramp. What is Θ?
63. If the speed of on object is doubled then the kinetic energy of that object will __________.
64. The Law of Conservation of Energy states what?
65. Two horses pull a cart. Each exerts a force of 500.0 N at a speed of 4.0 m/s for 10.0 min. What is the power
delivered by the horses?
66. Two horses pull a cart. Each exerts a force of 500.0 N at a speed of 4.0 m/s for 10.0 min. How much work
is done by the two horses?