Question 1 A motionless sailboat, tied to a mooring with a line, weighs 1,125N.

Question

Question 1

A motionless sailboat, tied to a mooring with a line, weighs 1,125N. The mooring line pulls horizontally toward the west on the sailboat with a force of 386N. The sails are stowed away and the wind blows from the west. The boat is moored on a still lake - no water currents to push on it. Draw an FBD for the sailboat and indicate the magnitude of each force.

W sailboat- earth ______ N _____ degree

F sailboat- wind ______N ______ degree

F sailboat- lake ______N ________ degree

F sailboat-mooring line ______ N _______ degree

Question 2

A bike is hanging from a hook in a garage. Consider the following forces: (a) the force of the bike pulling up on the earth

, (b) the force of the Earth pulling down on the bike, (c) the force of the hook pulling up on the bike, and (d) the forece of the hook pulling down on the celing. Which two are equal and opposite forces because of Newtons third law?

A & D

B & A

B & C

C & D

Which two forces are equal and opposite forces because of Newtons first law?

C & D

A & C

B & A

B & C

Explanation / Answer

Question 2

According to Newtons third law

B & A and C & D are equal and opposite forces .

and according to Newtons first law

B & A and C & D are equal and opposite forces.

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