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read the descriptions. check the boxes to show whether they describe sp…

Question

read the descriptions. check the boxes to show whether they describe speed or velocity. this involves displacement. this involves direction. this involves total distance. 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 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. a turtle walks north at a rate of 4 mph. velocity speed

Explanation:

Brief Explanations

Speed is a scalar quantity that only involves the magnitude of how fast an object is moving (total distance covered per unit time). Velocity is a vector quantity that involves both the magnitude of motion and the direction of motion. Displacement is related to velocity as it is the change in position in a particular direction.

  1. "This involves displacement": Displacement is related to velocity, so check the Velocity box.
  2. "This involves direction": Direction is a key - part of velocity, so check the Velocity box.
  3. "This involves total distance": Total distance is related to speed, so check the Speed box.
  4. "A turtle walks at a rate of 4 mph, then stops. Then, the turtle starts walking again at a rate of 4 mph": Only magnitude of motion is given, so check the Speed box.
  5. "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": Direction change is mentioned, so check the Velocity box.
  6. "A turtle walks at a rate of 4 mph": Only magnitude is given, so check the Speed box.
  7. "A turtle walks north at a rate of 4 mph": Direction (north) is given along with magnitude, so check the Velocity box.

Answer:

StatementVelocitySpeed
This involves direction$\boxed{\surd}$
This involves total distance$\boxed{\surd}$
A turtle walks at a rate of 4 mph, then stops. Then, the turtle starts walking again at a rate of 4 mph$\boxed{\surd}$
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$\boxed{\surd}$
A turtle walks at a rate of 4 mph$\boxed{\surd}$
A turtle walks north at a rate of 4 mph$\boxed{\surd}$