Question

(02.06 mc) a biker is making a turn around the corner. the bikers speed remained constant at 12 miles per hour during the entire turn. which of the following statements describes the forces on the biker? a the forces were balanced to keep the biker with a constant speed. b the forces were unbalanced as the biker made the turn. c the forces were balanced due to the bikers inertia. d the forces were unbalanced due to the action - reaction pair required to turn.

Explanation:

When an object changes its direction (as the biker does while turning), even if its speed is constant, its velocity changes (since velocity is a vector with both speed and direction). A change in velocity means an acceleration is occurring. According to Newton's first law, an unbalanced force is required to cause an acceleration. So, the forces on the biker are unbalanced during the turn.

Answer:

B. The forces were unbalanced as the biker made the turn.