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A 70-kg sprinter pushes on the starting blocks for 0.20 s
and leaves them with a speed of 5.0 m/s. He then continues
to accelerate for a further 5.0 s until his speed is 12 m/s. Find
the reaction force exerted by the starting blocks on the sprinter
and his average power output in each of the accelerations.
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Physics, 22.06.2019 12:30
As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?
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Physics, 22.06.2019 16:30
If anyone who can me with this hw? i would really appreciate it
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A 70-kg sprinter pushes on the starting blocks for 0.20 s
and leaves them with a speed of 5.0 m/s....
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