Review: Speed and Velocity
A caterpillar climbs up a one-meter wall. For every 2 cm it climbs up, it slides down 1 cm. It takes 10 minutes for the caterpillar to climb to the top. Calculate the speed at which the caterpillar travels.
.5 cm/s
A car travels 30 km north in 25 min. and 40 km east in 35 min. What is the total time in hours? Be careful to carry over the proper number of significant figures when you convert to hours.
1 h
City B is northwest of City A and the 400 mile trip by car takes 8 hours. City B is exactly 320 miles NW of City A if able to travel in a straight line. What is the velocity of the car?
40 mph NW
To reach city A, you travel north for 2.00 hours covering 80.0 miles. You then turn due east and travel 45.0 minutes for another 20.0 miles to reach your destination. On the first leg of your trip (traveling north), what is your speed?
40.0 mph
City B is northwest of City A, and the 400 mile trip by car takes 8 hours. The cities are 320 miles apart if able to travel in a straight line. What is the speed of a trip from City A to City B?
50 mph
If a car travels 30.0 mi. north for 30.0 min., 50.0 mi. east for 1.00 hour, and 30.0 mi. south for 30.0 min., what is the average speed of the car over the total trip?
55.0 mph
If a car travels 30 mi. north for 30 min., 60 mi. east for 1.0 hour, and 30 mi. south for 30 min., what is the average speed of the car over the first two legs of the trip?
60 mph
A car travels 30 km north in 25 min. and 40 km east in 35 min. What is the total distance traveled?
70 km
motion
a continuous change of position
velocity
the rate at which displacement changes with respect to time; a vector quantity
speed
the rate at which distance changes with respect to time; a scalar quantity
instantaneous speed
the speed at any instant
average speed
the total distance traveled divided by the total time traveled
A caterpillar climbs up a one-meter wall. For every 2 cm it climbs up, it slides down 1 cm. It takes 10 minutes for the caterpillar to climb to the top. What is the distance traveled? (Round the number to the nearest hundred.)
300 cm
A caterpillar climbs up a one-meter wall. For every 2 cm it climbs up, it slides down 1 cm. It takes 10 minutes for the caterpillar to climb to the top. Calculate the time involved in seconds (not minutes).
600 s
If the car went 30 km west in 25 min. and then 40 km south in 35 min., what would be its average speed?
70 km/h
If the odometer on the car reads 25.0 km at the beginning of a trip and 65.0 km a half hour later, what is the average speed of the car? (Remember significant digits.)
80.0 km/h