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Teresa would like to complete a 100 meter swim in record pace of 48 seconds. What must her average velocity be?
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- To pass a physical fitness test, Massimo must run 1000 m at an average rate of 4.00 m/s. He runs the first 900 m in 250 s. In how much time must he run the last 100 m to pass the test?In the first 10s of a body's motion, the velocity changes from 10 m/s to 20m/s. During the next 30s the velocity changes from 20m/s to 50m/s. What is the average acceleration in m/s2?I am having trouble with an average speed problem. The problem states that a person walks at 4.5 meters per second from point a to b. Then walks back from point b to a at a speed of 3.2 m/s. I know that average speed is displacement/time. However I am not sure how to calculate time or displacement from the two givens. The problem also gives that the average velocity is 0.
- To take off from the ground, an airplane must reach a sufficiently high speed. The velocity required for the takeoff, the takeoff velocity, depends on several factors, including the weight of the aircraft and the wind velocity.What is the distancedfirsttraveled by the plane in the first second of its run?Express your answer numerically in meters using three significant figures.If a cyclist finished a 100 km leg of the Tour de France in 3 hours, what was the cyclist's average velocity?s O 33 km/h O 100 km/h O 3.3 km/h O 33 m/sNow let’s apply our definition of average velocity to a swimming competition. During one heat of a swim meet, a swimmer performs the crawl stroke in a pool 50.0 mm long, as shown in (Figure 1). She swims a length at racing speed, taking 24.0 ss to cover the length of the pool. She then takes twice that time to swim casually back to her starting point. Find (a) her average velocity for each length and (b) her average velocity for the entire swim. c) If the swimmer could cross a 15 kmkm channel maintaining the same average velocity as for the first 50 mm in the pool, how long would it take?
- The DR Horton Tower in Fort Worth is 400 m tall. Joe wants to set the world’s stair climbing record and runs all the way to the roof of the tower. If Joe’s average upward speed is 0.60 m/s, how long will it take Joe to climb from street level to the roof of the Tower?A particle at t₁ = -2.0 s is at x₁ = 4.3 cm and at t₂ = 4.5 s is at x₂ = 8.5 cm. What is its average velocity? Can you calculate its average speed from these data?On your wedding day you leave for the church 30.0 minutes before the ceremony is to begin, which should be plenty of time since the church is only 10.0 miles away. On the way, however, you have to make an unanticipated stop for construction work on the road. As a result, your average speed for the first 15 minutes is only 5.0 mi/h. What average speed do you need for the rest of the trip to get you to the church on time?