Answer:
The answers to the questions asked are
question 1 : false
question 2: True
question 3: 17 meters
question 4: 2 meters
question 5: she did not do anything wrong
question 6: 28 mph
question 7: 12 mph
question 8: 0.27 m/s
question 9: True
question 10: false
Explanation:
question 1: speed is the total distance covered by an object over a given time regardless of the direction of the distance hence when reporting we report only the value and unit of the speed which ( km/h )or ( m/s )
question 2: velocity is change in distance covered by an object ( on a straight line) also known as displacement. over a given time by the object hence the direction of the object is considered
question 3: to calculate for distance traveled by an object you have to sum up the total distance traveled by the object on a straight line i.e ( 10 + 7 ) = 17 meters
question 4: displacement is change in distance traveled by an object on a straight line in opposite direction i.e ( 7 - 5 ) = 2 meters
question 5: displacement is change in distance traveled on a straight line in opposite direction hence her answer was correct i.e ( 13 - 10) = 3 meters
question 6: speed = distance/time equation 1
distance = 5 + 2 = 7 miles
time = 1/4 hour = 0.25 hour
equation 1 becomes
speed = 7/0.25 = 28 mph
question 7: Average velocity = displacement/time equation 1
displacement = 5 - 2 = 3 miles
time = 1/4 = 0.25 hour
equation 1 becomes
average velocity = 3/0.25 = 12 mph
question 8: Average speed = total distance / total time equation 1
total distance = 0.75 + 0.75 + 0.75 = 2.25 meters
this is considered the total distance because for each trial she covered ramp which was 0.75 meters
total time = 2.5 + 2.75 + 2.98 = 8.23 seconds
equation 1 becomes
average speed = 2.25 / 8.23 = 0.27 m/s
question 9: It is true because precise is a data that is repeated over and over which might not actually be the actual/correct value while accurate is the data that is closest to the known value
question 10: from the definition in question 9 above the answer is false
