Posted by **Jessica** on Thursday, July 12, 2012 at 1:33pm.

Jack Sparrow swings on a 3 m long rope that was horizontal before he jumped from the boom of the Black Pearl. At the very bottom of his arc, he grabs Elizabeth Swann and they swing upward together. Sparrow (Depp) has a mass of 75 kg, and Swann (Knightley) has a mass of 50 kg (amazing what you can find with Google). How high do they swing after the ‘collision’?

- Physics -
**Elena**, Thursday, July 12, 2012 at 1:52pm
m1=75 kg, m2 =50 kg. L=h=3m

Law of conservation of energy

PE1=KE1

m1•g•h = m1•v1²/2,

v1=sqrt(2•g•h) =sqrt(2•9.8•3)=7.67 m/s.

Law of conservation of momentum

m1•v1 =(m1+m2) •u

u= m1•v1/(m1+m2) =75•7.67/125 =4.6 m/s.

Law of conservation of energy

KE2=PE2

(m1+m2)•u²/2=(m1+m2)•g•H,

H= u²/2g=4.6²/2•9.8=1.08 m.

## Answer this Question

## Related Questions

- physics - A stunt man whose mass is 70 kg swings from the end of a 4.4 m long ...
- physics - In a Broadway performance an 81.0 kg actor swings from a 2.35 m long ...
- physics - In a Broadway performance, an 80 kg actor swings from a 3.75 m long ...
- physics - way performance, an 95.6 kg actor swings from a 4.30 m long cable that...
- Physics urgent help have a test!!! - 1. a little spider monkey named flo has ...
- Physics - A child swings from a rope of length L. If she starts her swing with ...
- physics - A 52kg teen grabs onto a rope swing. The length of rope between the ...
- Language Arts - Boom, Boom- the music goes Boom, Boom- Feel the beat from head ...
- physics - A 1500-N uniform boom at = 61.0° to the horizontal is supported by a ...
- physics - A 1300-N uniform boom at phi = 64.0° to the horizontal is supported by...

More Related Questions