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**1.**

A 1000 kg plane is trying to make a forced landing on the deck of a large 2000 kg barge at rest on the surface of a calm sea. The only frictional force to consider is between plane's wheels and the deck, and this braking force is constant and equal to one-quarter of the plane's weight. What must the minimum legnth of the barge be, in order that the plane can stop safely on the deck, if the plane touches down just at the rear end of the deck with a velocity of 50 m/s towards the front of the barge? (SIN.'76)

**PLEASE write out the full solution!**

Additional Details

The answer is 3.4*10^2 meters.

A 1000 kg plane is trying to make a forced landing on the deck of a large 2000 kg barge at rest on the surface of a calm sea. The only frictional force to consider is between plane's wheels and the deck, and this braking force is constant and equal to one-quarter of the plane's weight. What must the minimum legnth of the barge be, in order that the plane can stop safely on the deck, if the plane touches down just at the rear end of the deck with a velocity of 50 m/s towards the front of the barge? (SIN.'76)

**PLEASE write out the full solution!**

Additional Details

The answer is 3.4*10^2 meters.

**2.**

work = force applied * displacement

momentum = mass*velovity

m1v1 + m2v2 = m1v1' + m2v2'

work = force applied * displacement

momentum = mass*velovity

m1v1 + m2v2 = m1v1' + m2v2'

**3.**

Plane

m = 1000 kg

Vi = 50m/s

Vf = 0 m/s

Barge

m = 2000kg

Vi = 0 m/s

Force of friction = force of normal = mass*g

m1v1 + m2v2 = m1v1' +m2v2'

1000(50) + 2000(0) = 1000(0) + 2000v2'

1000(50)

________ = v2'

2000

25 m/s = v2' = speed of barge in oppsite direction

** I DUNT EVEN NOE IF THE STUFF I DID ABOVE IS RIGHT*** BUT NOW I"M LOST**** HELP MEEE***

Plane

m = 1000 kg

Vi = 50m/s

Vf = 0 m/s

Barge

m = 2000kg

Vi = 0 m/s

Force of friction = force of normal = mass*g

m1v1 + m2v2 = m1v1' +m2v2'

1000(50) + 2000(0) = 1000(0) + 2000v2'

1000(50)

________ = v2'

2000

25 m/s = v2' = speed of barge in oppsite direction

** I DUNT EVEN NOE IF THE STUFF I DID ABOVE IS RIGHT*** BUT NOW I"M LOST**** HELP MEEE***