Identify the following quantities as scalar or vector: the speed of a snail, the time it takes to run a mile, the free-fall acceleration. a. vector, scalar, scalar c. vector, scalar, vector b. scalar, scalar, vector d. scalar, vector, vector

Answer: b) Scalar, scalar, vector.

Explanation: A scalar is just a number, this can be the speed for example, while a vector is a number that also has a direction, for example, velocity.

the speed of a snail: This is just a quantity, this would be a scalar.

the time it takes to run a mile. Just a quantity, this is a scalar.

the free-fall acceleration. The acceleration is the rate of change of the velocity, so this has a magnitude and a direction, so this is a vector.

Then the correct answer is b) Scalar, scalar, vector.

B scalar scalar vector