Review for Chapter 4 & 6 Test : Vector, Forces & Newton’s Laws
There is not enough room on here to answer the questions. Please answer every question on your own sheet of paper.
1. Be able to identify the following terms if given a multiple choice, matching, picture, graph situation.
Acceleration due to gravity Force Kilogram
Component Force of gravity Long-Range Force
Constant force Free-body diagram Net Force
Displacement Inertia Newton’s 1st Law
Distance Interaction Pair Newton’s 2nd Law
Equilibrant Inverse Relationship Newton’s 3rd Law
Equilibrium Direct Relationship Resultant Vector
Scalar Quantity Vector Quantity Vector Resolution
2. What is the difference between a vector quantity and a scalar quantity?
3. What are vectors drawn to represent?
4. What is used to draw a vector?
5. How do you get the resultant vector when 2 or more vectors point in the same direction?
6. How do you get the resultant vector when 2 or more vectors point in opposite directions?
7. What do the terms headwind and tailwind mean?
8. Be able to draw and or label the sides/angles of a triangle. Do so in the space below
9. Which trig function(s) would you use to solve for the hypotenuse of a triangle?
10. Why do we use parallelograms to work out trig problems?
11. What part of the parallelogram is the resultant of the trig problem?
12. What are the components of a vector problem and the resultant of a vector problem?
13. What do you get when you combine a horizontal component with a vertical component?
14. Be able to solve problems like in your notes or your vector worksheets.
15. Draw a vector diagram and find the resultant: a boat moves at 15m/s east in a river that flows south at 4 m/s.
16. A girl jumps on a trampoline and travels 2.5m up and 3.5 m down… ignoring horizontal effects as she jumped “off” the trampoline, what is her displacement? (Draw a picture)
17. In which direction (x or y) is your displacement least if you travel 5km at 30 degrees east of north? (Draw and solve)
18. On an egg hunt, you run 5 m north to gather your first egg, turn east and jog 15 m for the second egg, dropping your basket along the way. You turn back west to retrieve your basket traveling 7 m to get it. Sketch your magnitude and direction of your displacement. (You must use inverse tan θ to find direction)
19. Find θ if: tan θ = 0.4545; sin θ = 0.2568; cos θ = 0.6157
20. Find the x and y components of a velocity vector of magnitude 125 km/h at 36degrees south of west
21. State the:
a. 1st law of Motion
b. 2nd Law of Motion
22. What causes acceleration?
23. What is a net force?
24. What value or amount of net force must an object have exerted on it to change its state of motion?
25. What is inertia?
26. Why does it require less force to accelerate a low mass object compared to a high mass object?
27. Give the difference between mass and weight.
28. According to the 2nd Law of motion, what produces motion or a change in a state of motion?
29. What is friction?
30. List the possible forces that can be exerted on an object.
31. Why are forces described as vectors? What are 4 types of vectors we have talked about?
32. Does the Law of Inertia pertain to moving objects, objects at rest or both? Explain
33. What is the net force or resulting force acting on an object in equilibrium?
34. Forces of 10 N and 15 N in the same direction act on an object. What is the net force on the object?
35. Many automobile passengers suffer neck injuries when struck by cars from behind. How does Newton’s Law of Inertia apply here? How do headrests help to guard against this type of injury?
36. Suppose a cart is moved by a certain net force. If the net force is doubled, by how much does the car’s acceleration change?
37. Suppose a cart is being moved by a certain net force. If a load is dumped into the cart so its mass is doubled, by how much does the acceleration change?
38. What is the cause of friction and in what direction does it act with respect to the motion of the sliding object?
39. If the force of friction acting on a sliding crate is 100N, how much force must be applied to maintain a constant velocity? What will be the net force acting on the crate? What will be the acceleration?
40. The force of gravity is twice as great on a 2 kg rock as on a 1 kg rock. Why does the 2 kg rock not fall with twice the acceleration?
41. If you push horizontally on your book with a force of 1 N to make the book slide at constant velocity, how much force is the force of friction on the book?
42. Convert 55 km/hr to m/s.
43. Calculate (a) the force required to move a 45 kg box at 3.7 m/s2. (b) What is the weight of the box?
44. A balloon supports a sign with a mass of 15 kg. What is the tension in the string holding the balloon to the sign?
45. An airplane travels at 360 km/hr due north. If it encounters a 70 km/hr headwind, at what speed does the shadow of the plane move across the ground?
**Rework the problems on any of our homework assignments that you need to. Look at the packet of examples that we did in class. Look over your notes!!!!!