SECTION REVIEW 3-1 pg 87

1. Which of the following properties are scalars and which
are ** vectors**?

*a)
the acceleration of a plane as it takes off*

b) the number of passengers on the plane

c) the duration of the flight

*d)
the displacement of the flight*

e) the amount of fuel required for the flight

2. A roller coaster moves 85 m horizontally, then travels 45
m at an angle of 30° above the horizontal. What is its displacement from its
starting point. Use graphical techniques (with ruler, proctractor and graph
paper) *DRAWING
ACCURATELY: RESULTANT IS 125.9 M AT 10.3 degrees above the horizontal. (79.7
degrees to the vertical)*

3. A novice pilot sets a plane’s controls, thinking that the plane will fly 250 km/hr to the north. If the wind blows at 75 km/hr to the south east ( 135 °), what is the plane’s resultant velocity? Use graphical techniques (with ruler, proctractor and graph paper)

*Drawing accurately: Resultant is 203.98 kn/hr at 15
degrees East of North (75 degrees North of East).*

4. While flying over the Grand Canyon, the pilot slows the planes engines down to one-half the velocity in item 3 (125 km/hr to the north). If the wind’s velocity is still 75 km/hr to the southeast (135°), what will the planes new resultant velocity be? Use graphical techniques (with ruler, proctractor and graph paper)

*Drawing accurately: Resultant is 89.4 km/hr at 36.4
degrees East of North (53.6 degrees North of East).*

5. The water used in many fountains is recycled (ugh!). For instance, a single water particle in a fountain travels through an 85 m system and then returns to the same point. What is the displacement of a water particle during one cycle?

**0**