Question

speed and velocity
quiz complete
xavier is roller skating at 14 km/h and tosses a set of keys forward on the ground at 8 km/h. the speed of the keys relative to the ground is km/h.

Explanation:

Step1: Analyze the motion direction

Both Xavier's skating and the keys' tossing are in the same forward direction.

Step2: Calculate the relative speed

When two objects move in the same direction, the relative speed of one object with respect to the ground is the sum of their individual speeds. So, we use the formula \(v = v_1 + v_2\), where \(v_1 = 14\) km/h (Xavier's speed) and \(v_2=8\) km/h (keys' speed relative to Xavier).

$$v=14 + 8$$

$$v = 22$$

Answer:

22