Question

1. motion can be described as vector or scalar quantities. define: vector quantities:__ scalar quantities: velocity: the distance - time graph below shows the motion of an object over a 10 second time interval. which of these describes the motion of the object from time 1 to 3 seconds? a. the object is accelerating. b. the object is decelerating. c. the object is at rest. d. the object is moving at a constant speed. 2)define: acceleration:__ this question has two parts. the graph below shows the velocity of an object over time. at what time does the graph show the greatest change in acceleration or deceleration? what is the acceleration or deceleration? a) 0 to 3 seconds b) 3 to 8 seconds c) 8 to 10 seconds

Explanation:

Vector quantities have both magnitude and direction. Scalar quantities have only magnitude. Velocity is a vector quantity that measures the rate of change of an object's position in a specific direction. For the distance - time graph from 1 to 3 seconds, since the graph is a straight - line segment, the object is moving at a constant speed as the slope (which represents speed) is constant. Acceleration is the rate of change of velocity. For the velocity - time graph, the greatest change in acceleration or deceleration occurs when the slope of the graph changes most rapidly. From 8 to 10 seconds, the velocity changes from 30 m/s to 0 m/s in 2 seconds, which is a large change in velocity over a short time interval compared to other intervals.

Answer:

Vector quantities: Quantities with magnitude and direction.
Scalar quantities: Quantities with only magnitude.
Velocity: A vector quantity representing the rate of change of position in a specific direction.
For the first multiple - choice question: D. The object is moving at a constant speed.
Acceleration: The rate of change of velocity.
For the second multiple - choice question: C. 8 to 10 seconds