Question

which one of the following statements describes an object moving at a constant velocity? the truck sped up from 47 mph to 73 mph while moving in a straight line. a car traveled at a constant speed along a straight line path. a spaceship slowed down while making a u - turn. the moped accelerated while making a right turn. a motorcycle traveled at a constant speed while making a left turn

Explanation:

Velocity is a vector quantity, which means it has both magnitude (speed) and direction. For an object to have a constant velocity, both its speed and direction must remain unchanged.

• The truck sped up from 47 mph to 73 mph while moving in a straight line: The speed (magnitude of velocity) changed, so velocity is not constant.
• A car traveled at a constant speed along a straight line path: Both speed (magnitude) and direction (straight - line) are constant. So, the velocity is constant.
• A spaceship slowed down while making a u - turn: The speed (magnitude) changed (slowed down) and the direction (u - turn) changed. So, velocity is not constant.
• The moped accelerated while making a right turn: The speed (magnitude) changed (accelerated) and the direction (right - turn) changed. So, velocity is not constant.
• A motorcycle traveled at a constant speed while making a left turn: The direction (left - turn) changed. Since velocity is a vector (speed + direction), velocity is not constant.

Answer:

A car traveled at a constant speed along a straight line path.