Question

1. read the descriptions. check the boxes to show whether they describe speed or velocity.

a turtle walks north at a rate of 4 mph.
a turtle walks at a rate of 4 mph in a straight line, then stops. next, he turns right, and again starts walking at a rate of 4 mph.
a turtle walks at a rate of 4 mph, then stops. then, the turtle starts walking again at a rate of 4 mph.
a turtle walks at a rate of 4 mph.
this involves displacement.
this involves direction.
this involves total distance.

Explanation:

Speed is a scalar quantity representing how fast an object is moving. Velocity is a vector quantity that includes both the speed of an object and its direction. Displacement and direction are associated with velocity, while total - distance is related to speed.

1. "A turtle walks north at a rate of 4 mph" has a direction, so it's velocity.
2. "A turtle walks at a rate of 4 mph in a straight line, then stops. Next, he turns right, and again starts walking at a rate of 4 mph" only mentions speed without a consistent direction throughout, so it's speed.
3. "A turtle walks at a rate of 4 mph, then stops. Then, the turtle starts walking again at a rate of 4 mph" only gives speed information, so it's speed.
4. "A turtle walks at a rate of 4 mph" only mentions speed, so it's speed.
5. "This involves displacement" is related to velocity as displacement is a vector quantity.
6. "This involves direction" is related to velocity as velocity has a direction component.
7. "This involves total distance" is related to speed as speed is based on total distance traveled over time.

Answer:

1. Velocity
2. Speed
3. Speed
4. Speed
5. Velocity
6. Velocity
7. Speed