Question

free - body diagrams with task tracker
a hockey puck glides to the right across the ice at a constant speed. ignore air resistance.
identify the type of forces and their relative magnitude. tap a direction and id the force type. tap an arrow on the diagram.

Explanation:

Step1: Analyze vertical forces

The hockey - puck has its weight $W = mg$ acting downwards and the normal force $N$ acting upwards. Since the puck is not moving vertically (constant vertical acceleration $a_y=0$), according to Newton's second law $F = ma$, in the vertical direction $F_y=N - mg=0$, so $N = mg$.

Step2: Analyze horizontal forces

The puck is moving at a constant speed, so its horizontal acceleration $a_x = 0$. According to Newton's second law $F_x=ma_x$, and since $a_x = 0$, the net horizontal force $F_x = 0$. There is no applied force in the horizontal direction, and ignoring air - resistance, the frictional force $f$ (which would act in the opposite direction of motion if present) is also zero in this ideal case.

Answer:

Vertical: Normal force $N$ upwards and weight $mg$ downwards, $N = mg$. Horizontal: No horizontal forces (net horizontal force is zero).