Question

1. which of the following best defines motion? *

the force that causes an object to move.
the speed of an object.
a change in an objects position relative to some other object or location.
the resistance of an object to change its position.

1. which of the following statements best describes the main difference between *

speed and velocity?
speed describes an objects change in position over time, velocity does not.
speed and velocity both describe an objects change in position over time, but
velocity includes the direction of motion.
speed only occurs when an object is gong fast, velocity can only occur when an
object is going slow.
there is no difference between them.

Explanation:

• Question 1: Motion is defined as a change in an object's position relative to some other object or location. Force causes motion (but is not the definition of motion), speed is a measure related to motion (rate of change of position), and resistance to change in position is inertia.
• Question 2: Speed is a scalar quantity (only magnitude - change in position over time). Velocity is a vector quantity (magnitude and direction - change in position over time with direction).

Answer:

1. A change in an objects position relative to some other object or location.
2. Speed and velocity both describe an objects change in position over time, but velocity includes the direction of motion.