Free Body Diagrams

Poll

Would you rather...?

• be an idiot in a world of geniuses

• ba genius in a world of idiots

Multiple Choice

A skier has reached the bottom of a hill and is coasting to the right while slowing down along the loosely-packed snow. Ignore air resistance.

What is the direction of the FRICTION force?

• There's no friction force

Multiple Choice

A skier has reached the bottom of a hill and is coasting to the right while slowing down along the loosely-packed snow. Ignore air resistance.

What is the direction of the NORMAL force?

• There's no normal force

Multiple Choice

A skier has reached the bottom of a hill and is coasting to the right while slowing down along the loosely-packed snow. Ignore air resistance.

What is the direction of the APPLIED force?

• There's no applied force

Multiple Choice

A downward-moving skydiver who has just opened the parachute is slowing down. Ignore air resistance.

What is the direction of the FRICTION force?

• There's no friction force

Multiple Choice

A downward-moving skydiver who has just opened the parachute is slowing down.

Ignore air resistance.

What is the direction of the TENSION force?

• There's no tension force

Multiple Choice

A rightward force is applied to a dresser to accelerate it to the right across the bedroom floor. Ignore air resistance.

What is the direction of the FRICTION force?

• There's no friction force

Multiple Choice

A rightward force is applied to a dresser to accelerate it to the right across the bedroom floor. Ignore air resistance.

What is the direction of the APPLIED force?

• There's no applied force

Multiple Choice

A rightward force is applied to a dresser to accelerate it to the right across the bedroom floor. Ignore air resistance.

Which force is stronger?

• Normal force

• Friction force

• Gravity force

• Applied force

• They are all the same

Multiple Choice

A hockey puck glides to the right across the ice at a constant speed. Ignore air resistance.

What is the direction of the NORMAL force?

• There's no normal force

Multiple Choice

A hockey puck glides to the right across the ice at a constant speed. Ignore air resistance.

What is the direction of the APPLIED force?

• There's no applied force

Multiple Select

A hockey puck glides to the right across the ice at a constant speed. Ignore air resistance.

Which forces are the same?

• Normal force

• Friction force

• Gravity force

• Applied force

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