Free Body Force Diagrams - Balanced Beams

Question 1

Beam resting on two points - Where is the weight of the beam?

Answer 1

The weight of a uniform beam is taken to act at its centre.

Question 2

What force will be experienced if an object is placed on the beam?

Answer 2

Normal Contact Force.

Question 3

Objects resting agianst rough and smooth surfaces - If a surface is rough what needs to be taken into account?

Answer 3

Friction needs to be taken into account.

Question 4

Objects resting against rough and smooth surfaces - How do we treat a smooth surface?

Answer 4

Treat it as friction free.

Question 5

Objects resting against rough and smooth surfaces - On rough surfaces what two forces are acting?

Answer 5

• Normal Contact force
• Friction

Question 6

Objects resting against rough and smooth surfaces - On smooth surfaces what forces are acting?

Answer 6

• Normal Contact Force

Question 7

Objects resting against rough and smooth surfaces - At what angle does normal contact force act?

Answer 7

90 degrees.

Question 8

Objects resting against rough and smooth surfaces - How do you know which way to point the friction force?

Answer 8

The way the ladder falls friction is in the opposite direction because friction always opposes motion.

Question 9

Beam Resting on Two Points - DIAGRAM??

Answer 9

Question 10

Beam resting on two points - DIAGRAM with on object on the beam.

Answer 10

Question 11

Objects resting against a smooth an rough surface - Diagram of a ladder leaning against a wall.

Answer 11

Question 12

Moving Objects - Free body diagram of a car on a level road.

Answer 12

Question 13

Moving Objects - Free Body Diagram of a car on a slope.

Answer 13