VB You are rowing in the boat at a constant velocity v₁ = 4.00 km/h, with a combined mass of boat and you of mB = 300 kg. A rock of mass mR = 5.00 kg is lying in in the boat. You throw the rock from the back of the boat applying a force of F = 50.0 N for a duration of t = 1.00 s. We want to find the speed of the boat v after the throw. We will neglect the air and water friction. a) Using the impulse momentum theory compute the final momentum of the rock. (2 points) b) Using the equation of conservation of momentum compute the final velocity of the boat vB. (2 points). c) Compute the total initial and total final kinetic energies of the boat+rock system. Is the kinetic energy conserved? Why? (2 points).

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Chapter9: Linear Momentum And Collisions
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VB
You are rowing in the boat at a constant velocity v₁ = 4.00 km/h, with a combined mass of boat
and you of mB = 300 kg. A rock of mass mR = 5.00 kg is lying in in the boat. You throw the rock
from the back of the boat applying a force of F = 50.0 N for a duration of t = 1.00 s. We want to
find the speed of the boat v after the throw. We will neglect the air and water friction.
a) Using the impulse momentum theory compute the final momentum of the rock. (2
points)
b) Using the equation of conservation of momentum compute the final velocity of the
boat vB. (2 points).
c) Compute the total initial and total final kinetic energies of the boat+rock system. Is
the kinetic energy conserved? Why? (2 points).
Transcribed Image Text:VB You are rowing in the boat at a constant velocity v₁ = 4.00 km/h, with a combined mass of boat and you of mB = 300 kg. A rock of mass mR = 5.00 kg is lying in in the boat. You throw the rock from the back of the boat applying a force of F = 50.0 N for a duration of t = 1.00 s. We want to find the speed of the boat v after the throw. We will neglect the air and water friction. a) Using the impulse momentum theory compute the final momentum of the rock. (2 points) b) Using the equation of conservation of momentum compute the final velocity of the boat vB. (2 points). c) Compute the total initial and total final kinetic energies of the boat+rock system. Is the kinetic energy conserved? Why? (2 points).
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