helpa

  1. C

    Physics help...A person with a blackbelt in karate has a fist that has a mass of

    0.62 kg. Starting from rest,? A person with a blackbelt in karate has a fist that has a mass of 0.62 kg. Starting from rest, this fist attains a velocity of 9.0 m/s in 0.15 s. What is the magnitude of the average net force applied to the fist to achieve this level of performance?
  2. C

    Physics help...A person with a blackbelt in karate has a fist that has a mass of

    0.62 kg. Starting from rest,? A person with a blackbelt in karate has a fist that has a mass of 0.62 kg. Starting from rest, this fist attains a velocity of 9.0 m/s in 0.15 s. What is the magnitude of the average net force applied to the fist to achieve this level of performance?
  3. C

    Physics help...A person with a blackbelt in karate has a fist that has a mass of

    0.62 kg. Starting from rest,? A person with a blackbelt in karate has a fist that has a mass of 0.62 kg. Starting from rest, this fist attains a velocity of 9.0 m/s in 0.15 s. What is the magnitude of the average net force applied to the fist to achieve this level of performance?
  4. G

    Help!!!!!!!!!A 2.15 x 103 kg truck travels at 30.0 m/s when it collides...

    ...head on with a light post. If th....? 1.A 2.15 x 103 kg truck travels at 30.0 m/s when it collides head on with a light post. If the truck comes to a complete stop in 0.45 s, what is the average force exerted on the truck by the post during the collision? please show me how to do this question
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