Determine the velocity of an object with respect to an observer if the object is moving along a medium that moves relative to the observer. Includes 5 problems.
Al Wayzflyin is walking on a moving walkway through a long corridor at the airport. He is walking forward on a walkway which moves with a speed of 1.01 m/s with respect to the surrounding corridor. Al walks with a speed of 4.38 m/s with respect to the walkway. What is Al's speed with respect to the surrounding corridor?
Speed
m/s
Otis is baby-sitting his neighbor's children. He loads the toddler into the wagon and begins a walk down the sidewalk at 0.63 m/s. A ball in the wagon begins rolling towards the back of the wagon at 0.31 m/s relative to the wagon. What is the speed of the ball relative to the street?
The takeoff speed of a military aircraft from an aircraft carrier is approximately 115.0 mi/hr relative to the air. They acquire this speed through a combination of a catapult system present on the aircraft carrier and the aircraft's jet propulsion system. A common strategy is to head the carrier and the plane into the wind. If a plane is taking off from an aircraft carrier which is moving at 44.0 mi/hr into a 18.0 mi/hr headwind, then what speed relative to the deck of the aircraft carrier must it obtain to takeoff?
Takeoff Speed
mi/hr
On the trip to the Woodfield Mall last weekend, Morgan takes the escalator 19.2 m from the first floor to the third floor. She observes that when standing on the up side, it takes 44.9 seconds to ride to the top. On another trip up the same escalator, she is passed by a person walking with a speed of 0.77 m/s relative to the escalator.
What is Morgan's speed when riding the escalator in a standing position?
Morgan's Speed
What is the walking person's resultant speed relative to the first floor?
Walker's Speed
How much time does it take the walking person to travel from the first floor to the third floor?
Walker's time up
seconds
How much time would it take to walk down the 'up' escalator with the same relative speed of 0.77 m/s?
Walker's time down
Rex Things has a pitching speed of 67.6 km/hr. Rex stands in the back of a flatbed truck and throws a ball towards Dennis Elbough who is standing on the sidewalk. The truck is moving away from Dennis at 41.3 km/hr. Meanwhile, Eileen Dover is cruising down the street towards Dennis at 21.6 km/hr.
What is the speed of the baseball with respect to Dennis? Enter a positive value.
Baseball speed
km/hr
What is the speed of the truck with respect to Eileen? Enter a positive value.
Truck speed
What is the speed of the baseball with respect to Eileen? Enter a positive value.