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A sprinter is 50m behind marathoner. The sprinter is moving at 10m/s and the marathoner is moving at 6m/s. When will the sprinter cath the marathoner? Choose closet answer between 12seconds  and 10seconds

 

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

In a women's 100m race, accelerating uniformly, Laura takes 2.00 sand Healan 3.00 s to attain their maximum speeds, which they eachmaintain for the rest of the race. They cross the finish linesimultaneously, both setting a world record of 10.4 s.
(a) what is the acceleration of each sprinter?
(b) What are their respective maximum speeds?
(c) which sprinter is ahead at the 6.00 s mark, and by howmuch?
(d) What is the maximum distance by which Healan is behind Laura,and at what time does that occur?

In a women's 100-m race, accelerating uniformly, Laura takes 2 s and Healan 3.00 to attain their maximum speeds, which they each maintain for the rest of the race. They cross the finish line simultaneously, both setting a world record of 10.4 s.

(a) Which sprinter is ahead at the 6.00 s mark, and by how much?

b)what is the maximum distance by which Healan is behind Laura?
 
c) At what time does that occur?

A 77 kg sprinter is running the 100 m dash. At one instant, earlyin the race, his acceleration is 4.7 m/s^2.

1. What total force does the track surface exert on the sprinter?Assume his acceleration is parallel to the ground. Give your answeras a magnitude.

2. What total force does the track surface exert on the sprinter?Assume his acceleration is parallel to the ground, and give youranswer as an angle with respect to the horizontal.

3. This force is applied to one foot (the other foot is in theair), which for a fraction of a second is stationary with respectto the track surface. Because the foot is stationary, the net forceon it must be zero. Thus the force of the lower leg bone on thefoot is equal but opposite to the force of the track on the foot.If the lower leg bone is 60 degrees from horizontal,what is thecomponents of the leg’s force on the foot in the direction parallelto the leg? (Force components perpendicular to the leg can causedislocation of the ankle joint.)

4. What is the components of the leg’s force on the foot in thedirection perpendicular to the leg?

Any help will be appreciated. Thanks :)

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