Review the graph below, which plots total distance traveled versus time of travel for a moving object.
Image
Why do the values on the graph form a straight line?
A.
The speed is constant.
B.
The distance remains unchanged.
C.
The direction of motion stays the same.
D.
The speed gradually increases over time.
A. The speed is constant.
Explanation: When the values on a distance versus time graph form a straight line, it indicates that the object is moving at a constant speed. If the speed were gradually increasing over time, the graph would show a curve rather than a straight line.
The diagram shows forces pulling on a box. Use the diagram to answer the questions that follow.
Multiple Choice Question
Which statement BEST describes the motion of the box when the forces pull on the box?
A.
The box will move to the left because the forces are balanced.
B.
The box will move to the right because the forces are balanced.
C.
The box will move to the left because the forces are unbalanced.
D.
The box will move to the right because the forces are unbalanced.
C. The box will move to the left because the forces are unbalanced.
Explanation: In the diagram, the forces pulling the box to the left are larger than the forces pulling the box to the right. As a result, the net force acting on the box is to the left, causing the box to move in that direction. This indicates that the forces are unbalanced.