Which statement accurately describes an unbalanced force?
Responses
A 2-N force presses down on the cement block at the same time as a 1.5-N force presses up on the cement block.
A 2-N force presses down on the cement block at the same time as a 1.5-N force presses up on the cement block.
Three rows of cement blocks form a foundation for a house, and the house rests on this foundation.
Three rows of cement blocks form a foundation for a house, and the house rests on this foundation.
The force of a house pressing down on its foundation of cement blocks is 3,000 N.
The force of a house pressing down on its foundation of cement blocks is 3,000 N.
Each cement block supports a 2-N force, but when the foundation is built in a staggered pattern, it can support 2,000 N.
Each cement block supports a 2-N force, but when the foundation is built in a staggered pattern, it can support 2,000 N.
If the net force on a 75-N object is 375 N from the left, in what direction will the object move?
Responses
to the side
to the side
in a straight line
in a straight line
toward the left
toward the left
toward the right
toward the right
What is the correct interpretation of this diagram?
Responses
Since the unbalanced force is a downward force, the object will move down.
Since the unbalanced force is a downward force, the object will move down.
Since the unbalanced force is at the top, the object will move down.
Since the unbalanced force is at the top, the object will move down.
Since the unbalanced force is an upward force, the object will move upward.
Since the unbalanced force is an upward force, the object will move upward.
Since three forces are balanced, the object will not change position.
Since three forces are balanced, the object will not change position.
Since the unbalanced force is an upward force, the object will move upward.
A speedboat travels from the dock to the first buoy, a distance of 20 meters, in 18 seconds. It began the trip at a speed of 0 meters per second. By the time it reached the buoy, it was going 10 meters per second.
What was the average velocity of the boat?
Responses
−3.33 m/s2
negative 3.33 meters per second squared,
−1.11 m/s
negative 1.11 meters per second,
+1.11 m/s
plus 1.11 meters per second,
+3.33 m/s
plus 3.33 meters per second,
+1.11 m/s
A 150-kg object takes 1.5 minutes to travel a 2,500-meter straight path. It begins the trip traveling 120 meters per second and decelerates to a velocity of 20 meters per second.
What was its acceleration?
Responses
−1.11 m/s2
negative 1.11 meters per second squared,
−0.3 m/s2
negative 0.3 meters per second squared,
+1.11 m/s2
plus 1.11 meters per second squared,
+80 m/s2
-1.11 m/s2
The statement that accurately describes an unbalanced force is:
A 2-N force presses down on the cement block at the same time as a 1.5-N force presses up on the cement block.
Explanation:
An unbalanced force occurs when the net force acting on an object is not equal to zero. In this case, there are two forces acting on the cement block - one is pressing down with a force of 2 N, while the other is pushing up with a force of 1.5 N. Since these forces are not equal in magnitude and opposite in direction, they do not cancel each other out, resulting in an unbalanced force. This unbalanced force will cause the cement block to accelerate in the direction of the larger force.