Calculate the final velocity right after a 119-kg rugby player who is initially running at 7.95 m/s collides head-on with a padded goalpost.?
Calculate the final velocity right after a 119-kg rugby player who is initially running at 7.95 m/s collides head-on with a padded goalpost and experiences a backward force of 1.81 × 104 N for 5.50 × 10-2 s.
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Verified answer
impulse = FΔt = 1.81e4N * 0.0550s = 995.5 N·s
so the final momentum
p = 119kg * 7.95m/s - 995.5N·s = -49.45 kg·m/s
resulting in a velocity
v = p / m = -0.416 m/s
Hope this helps!
"1.81 × 104 N' ?? what does this mean?