1.
Make a sketch to show the vectors for an airplane traveling at 220 miles per hour at an angle of 31° from the wind.
A.
B.
C.
D.
Hint
2.
Find the direction of the resultant vector for the diagram.
A.
55°
B.
18.4°
C.
71.6°
D.
60°
Hint
3.
If José pushes a cart horizontally, exerting a horizontal force of 0.5 N up a 45° incline so that the cart moves 3 m, how much work has José done on the cart? A joule (J) is the SI unit for work or energy. 1 J = 1 N ˇ 1 m
A.
J
B.
J
C.
J
D.
J
Hint
4.
Find the direction of the resultant of a 7-newton force at an angle of 35° above the
x
-axis and a 12-newton force at an angle of 35° below the
x
-axis.
A.
0°
B.
-10.4°
C.
-2.9°
D.
10.4°
Hint
5.
Find the magnitude of the resultant of a 7-newton force at an angle of 35° above the
x
-axis and a 12-newton force at an angle of 35° below the
x
-axis.
A.
15.8 N
B.
18.1 N
C.
7.4 N
D.
11.6 N
Hint