Question

16 - 2 mastery check: types of forces version a pass revise 1. dastardly dave has stolen all the catnip and is running away from 30 cats. label the forces acting on dave. 2. kraken kate blocks a hockey puck flying into the goal. label the forces acting on the puck. 3. sam the spider is hanging from a string of spider silk. label the forces acting on him. 4. samantha seagull slides across the field to the left at a soccer game. label the forces acting on her. normal force applied force air resistance gravity tension friction

Explanation:

Step1: Analyze forces on Dave

He is on the ground running, so there is normal force upward, gravity downward, applied force in the direction of his running, and air - resistance and friction opposite to his running direction.
Top arrow: normal force; Bottom arrow: gravity; Left arrow: air resistance/friction; Right arrow: applied force

Step2: Analyze forces on the hockey puck

It is in the air moving horizontally and vertically. There is gravity downward, air resistance opposite to its motion direction.
Left arrow: air resistance; Bottom arrow: gravity

Step3: Analyze forces on Sam the Spider

He is hanging by a silk, so there is tension upward and gravity downward.
Top arrow: tension; Bottom arrow: gravity

Step4: Analyze forces on Samantha Seagull

She is sliding on the ground. There is normal force upward, gravity downward, friction opposite to her sliding direction and air - resistance opposite to her motion direction.
Top arrow: normal force; Bottom arrow: gravity; Left arrow: friction/air resistance; Right arrow: no applied force (assuming no external push while sliding)

Answer:

1. Top: normal force; Bottom: gravity; Left: air resistance/friction; Right: applied force
2. Left: air resistance; Bottom: gravity
3. Top: tension; Bottom: gravity
4. Top: normal force; Bottom: gravity; Left: friction/air resistance; Right: no applied force (assuming no external push while sliding)