The average speed of a Greyhound bus from Lansing to Detroit is 117.5 km/h. On the...
The average speed of a Greyhound bus from Lansing to Detroit is 117.5 km/h. On the return trip from Detroit to Lansing the average speed is 53.2 km/h on the same road due to heavy traffic. What is the average speed of the bus for the round trip?
What is the arithmetic mean of the two speeds
above?
What is the harmonic mean of the two speeds
above?
Homework Answers
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The average speed of a Greyhound bus from Lansing to Detroit is
117.5 km/h. On the...
On a road trip, a driver achieved an average speed of 68 km/h for the first...
On a road trip, a driver achieved an average speed of 68 km/h for the first 86.0 km and an average speed of 38 km/h for the remaining 54.0 km. What was her average speed (in km/h) for the entire trip? Round your final answer to three significant figures.
A bus travels 280 km south along a straight path with an average velocity of 88 km/h to the south
A bus travels 280 km south along a straight path with an average velocity of 88 km/h to the south. The bus stops for 24 min, then it travels 210 km south with an average of 75 km/h to the south.a. How long does the total trip last?b. What is the average velocity for the total trip?
You normally drive on the freeway between San Diego and Los Angeles at an average speed...
You normally drive on the freeway between San Diego and Los Angeles at an average speed of 87 km/h (54 mi/h), and the trip takes 2 h and 49 min. On a Friday afternoon, however, heavy traffic slows you down and you drive the same distance at an average speed of only 62 km/h (39 mi/h). How much longer does the trip take?
An automobile travels on a straight road for 49 km at 39 km/h. It then continues...
An automobile travels on a straight road for 49 km at 39 km/h. It then continues in the same direction for another 49 km at 78 km/h. (a) What is the average velocity of the car during this 98 km trip? (Assume that it moves in the positive x direction.) (b) What is the average speed?
An automobile travels on a straight road for 35 km at 35 km/h. It then continues...
An automobile travels on a straight road for 35 km at 35 km/h. It then continues in the same direction for another 50 km at 55 km/h. (a)What is the average velocity(km/h) of the car during this 85km trip?(Assuming that it moves in the positive-x direction) (B)What is its average speed in m/s?
2. A car accelerates along a straight road from rest to 90 km/h in 5.0s. What is the magnitude of average accelerat...
2. A car accelerates along a straight road from rest to 90 km/h in 5.0s. What is the magnitude of average acceleration in meters per second squared. 3. If you are driving 110km/h along a straight road and look to the side for 2.0s, how far do you travel during this inattentive period? 4. At highway speeds, a particular car is capable of accelerating at about 1.8m/s?. At this rate, how long does it take to accelerate from 80km/h to...
A Ride to Grandma’s. Julie drives 100 km from her home to Grandmother’s house. On the...
A Ride to Grandma’s. Julie drives 100 km from her home to Grandmother’s house. On the way to Grandmother’s, Julie drives half the distance at 40.0 km/h and the other half at 60.0 km/h. On her return trip, she drives half the time at 40.0 km/h and half the time at 60.0 km/h. a) How long does the trip to Grandma’s take? What is her average speed for this trip? b) How long does the return trip take (from Grandma’s...
The speeds of vehicles on a highway with speed limit 90 km/h are normally distributed with...
The speeds of vehicles on a highway with speed limit 90 km/h are normally distributed with mean 104 km/h and standard deviation 6 km/h. (Round your answers to two decimal places.) (a) What is the probability that a randomly chosen vehicle is traveling at a legal speed? _______ % (b) If police are instructed to ticket motorists driving 110 km/h or more, what percentage of motorist are targeted? _______ %
The speeds of vehicles on a highway with speed limit 110 km/h are normally distributed with...
The speeds of vehicles on a highway with speed limit 110 km/h are normally distributed with mean 123 km/h and standard deviation 5 km/h. (Round your answers to two decimal places.) (a) What is the probability that a randomly chosen vehicle is traveling at a legal speed? (b) If police are instructed to ticket motorists driving 135 km/h or more, what percentage of motorist are targeted?
An airplane cruises at 880 km/h relative to the air. It is flying from Denver, Colorado,...
An airplane cruises at 880 km/h relative to the air. It is flying from Denver, Colorado, due west to Reno, Nevada, a distance of 1200 km, and will then return. There is a steady 70 km/h wind blowing to the east. What is the difference in flight time between the two legs of the trip?
2. A car accelerates along a straight road from rest to 90 km/h in 5.0s. What is the magnitude of average acceleration in meters per second squared. 3. If you are driving 110km/h along a straight road and look to the side for 2.0s, how far do you travel during this inattentive period? 4. At highway speeds, a particular car is capable of accelerating at about 1.8m/s?. At this rate, how long does it take to accelerate from 80km/h to...
The speeds of vehicles on a highway with speed limit 110 km/h are normally distributed with mean 123 km/h and standard deviation 5 km/h. (Round your answers to two decimal places.) (a) What is the probability that a randomly chosen vehicle is traveling at a legal speed? (b) If police are instructed to ticket motorists driving 135 km/h or more, what percentage of motorist are targeted?
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