Question

free-body diagrams ... the sequel with task tracker
a puck moves to the right over a cushion of air at a constant speed on an air hockey table. the puck is not contacting the table.
identify the type of forces and their relative magnitude.
tap a direction and id the force type. tap an arrow on the diagram to change the size of the force. tap check answer when ready.
select a direction:
right left up down
id the rightward force.
none gravity normal friction
applied air resist. spring tension
check answer

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Explanation:

Step1: Analyze motion conditions

The puck moves right at constant speed, so net force is 0 (Newton's 1st Law).

Step2: Identify vertical forces

Gravity acts downward, Normal force acts upward; they balance.

Step3: Identify horizontal forces

Air hockey cushion means no contact friction. No applied force is acting, so no rightward/leftward forces.

Step4: Match to options

Rightward force: None. Vertical forces: Gravity (down), Normal (up), balanced. No horizontal contact/applied forces.

Answer:

For the rightward force selection: None
Vertical forces: Gravity (direction: Down), Normal (direction: Up, equal magnitude to Gravity)
Horizontal forces: No other forces (Applied, Friction, etc.) act on the puck.