Shr > 3. The average velocity of a car during a 30-minute drive through town is 24 km/hr [S]
a) What is the car's displacement during these 30 minutes?
b) How much distance did the car travel over the whole trip?
c) What was the car's maximum speed during the trip?
d) What was the car's probable minimum velocity during the drive? OK minn
4. The average velocity of a couch potato during the 5 hour Super Bowl was 0.0 m/s.
a) Does this mean that the couch potato never got up to get snacks? Explain.
b) What is the couch potato's total displacement during the game? Explain.
c) Can you determine the couch potato's average speed during the game? Explain.
5. A car reversing at -7.2 m/s has a displacement of -21.6 m. How long did this take?
6. A bike travels at 5.0 m/s for 122 s, then speeds up to 6.0 m/s for 124 s. Find the total
displacement of the bike. (What do you have to assume in order to do this?)
7. Canora is 49.0 km straight north of Yorkton. Two cars leave Yorkton at the same time.
One car travels at 125 km/hr [N] and the other car travels at 104 km/hr [N]. Assume
the road is clear and they use their cruise control the entire drive. Find the amount of
time (in seconds) the faster car beats the slower car by.
8. A student walks the 80.0 m length of the main hallway in 60 s. They walk 0.8 m/s for
the first half of the distance. Find their velocity for the second half.
9. A car starting from rest accelerates to +30 m/s in a time of 5 seconds. Is it possible to
determine how much distance does the car cover during this time? Explain.
Answers: A question mark "?" means either it can't be done or the answer is non-
numerical. Many of these questions are undoable; you need to know why.
1. a) 0.00 m/s b) 8.00 m/s c) 0 m
6. 1350 m (use the adding rule for SF)
2. a) ? b)? c) 760 km (East)
7. 280 s (Did you use the correct SF
rule for each operation? Did you
3. a) 12 km [S] b)? c) ? d) 0 km/hr
round off only your final answer?)
4. a)? b) 0.0 m [forward) c)?
8. 4 m/s (only one SF in this one)
5. 3.0 s (Did you include the signs in
the calculation? You should have.)
9. Nope, not unless (preview for
tomorrow). need help with 3 to 9 please