The true statement about unbalanced forces is:
They can change both an object's speed and direction.
Unbalanced forces cause changes in the motion of an object, which includes changes to both its speed and its direction.
Which statement is true about unbalanced forces?(1 point)
Responses
They only change an object's speed.
They only change an object's speed.
They have no impact on an object in motion.
They have no impact on an object in motion.
They only change an object's direction.
They only change an object's direction.
They can change both an object's speed and direction.
They can change both an object's speed and direction.
11 answers
Two people apply a force to a box from opposite directions as shown in the picture below. The box does not move. Which statement best explains why the box does not move?
(1 point)
Responses
The forces have different magnitudes.
The forces have different magnitudes.
The box is experiencing unbalanced forces.
The box is experiencing unbalanced forces.
Balanced forces do not cause change in motion.
Balanced forces do not cause change in motion.
Push forces do not cause motion.
(1 point)
Responses
The forces have different magnitudes.
The forces have different magnitudes.
The box is experiencing unbalanced forces.
The box is experiencing unbalanced forces.
Balanced forces do not cause change in motion.
Balanced forces do not cause change in motion.
Push forces do not cause motion.
The statement that best explains why the box does not move is:
Balanced forces do not cause change in motion.
In this scenario, if the box is not moving despite two people applying forces from opposite directions, it indicates that the forces are balanced, meaning they have the same magnitude and are acting in opposite directions, resulting in no net force acting on the box.
What is the unit used for measuring force?(1 point)
Responses
kilometer
kilometer
gram
gram
newton
newton
joule
Responses
kilometer
kilometer
gram
gram
newton
newton
joule
The unit used for measuring force is:
newton.
One newton (N) is defined as the amount of force required to accelerate a one-kilogram mass by one meter per second squared.
Which example shows unbalanced forces acting on an object?(1 point)
Responses
Two people are on opposite sides of a large box. Both people pull the box with equal force.
Two people are on opposite sides of a large box. Both people pull the box with equal force.
Two people are on opposite sides of a large box. Both people push the box with equal force.
Two people are on opposite sides of a large box. Both people push the box with equal force.
Two people are on the same side of a large box. One person pushes the box and the other pulls the box with equal force.
Two people are on the same side of a large box. One person pushes the box and the other pulls the box with equal force.
Two people are on the same side of a large box. Both people pull the box with equal force.
Two people are on the same side of a large box. Both people pull the box with equal force.
Responses
Two people are on opposite sides of a large box. Both people pull the box with equal force.
Two people are on opposite sides of a large box. Both people pull the box with equal force.
Two people are on opposite sides of a large box. Both people push the box with equal force.
Two people are on opposite sides of a large box. Both people push the box with equal force.
Two people are on the same side of a large box. One person pushes the box and the other pulls the box with equal force.
Two people are on the same side of a large box. One person pushes the box and the other pulls the box with equal force.
Two people are on the same side of a large box. Both people pull the box with equal force.
Two people are on the same side of a large box. Both people pull the box with equal force.
The example that shows unbalanced forces acting on an object is:
Two people are on the same side of a large box. One person pushes the box and the other pulls the box with equal force.
In this scenario, the forces acting on the box are not balanced because one person is pushing while the other is pulling; thus, the net force will change depending on the direction and type of force applied.
A person tries to push a refrigerator across the kitchen. She applies as much force as possible, but she cannot make the refrigerator move.
Which statement BEST describes by the refrigerator does not move?
(1 point)
Responses
The person applies too much force to the refrigerator, and now the forces on the refrigerator are balanced.
The person applies too much force to the refrigerator, and now the forces on the refrigerator are balanced.
The person does not apply enough force to the refrigerator, so the forces are unbalanced.
The person does not apply enough force to the refrigerator, so the forces are unbalanced.
The person applies too much force to the refrigerator, and now the forces on the refrigerator are unbalanced.
The person applies too much force to the refrigerator, and now the forces on the refrigerator are unbalanced.
The person does not apply enough force to the refrigerator, so the forces are still balanced.
The person does not apply enough force to the refrigerator, so the forces are still balanced.
Which statement BEST describes by the refrigerator does not move?
(1 point)
Responses
The person applies too much force to the refrigerator, and now the forces on the refrigerator are balanced.
The person applies too much force to the refrigerator, and now the forces on the refrigerator are balanced.
The person does not apply enough force to the refrigerator, so the forces are unbalanced.
The person does not apply enough force to the refrigerator, so the forces are unbalanced.
The person applies too much force to the refrigerator, and now the forces on the refrigerator are unbalanced.
The person applies too much force to the refrigerator, and now the forces on the refrigerator are unbalanced.
The person does not apply enough force to the refrigerator, so the forces are still balanced.
The person does not apply enough force to the refrigerator, so the forces are still balanced.
The statement that BEST describes why the refrigerator does not move is:
The person applies too much force to the refrigerator, and now the forces on the refrigerator are balanced.
This implies that the force she is applying is equal to the opposing forces (such as friction and weight) acting on the refrigerator, resulting in no movement.
Solving the system y=−x+3 and x+y=8 by graphing shows that there is no solution to the system. Is this statement true or false? Explain.
(1 point)
Responses
The statement is false, because the lines have an intersection point.
The statement is false, because the lines have an intersection point.
The statement is true, because the lines are parallel.
The statement is true, because the lines are parallel.
The statement is false, because the lines are parallel.
The statement is false, because the lines are parallel.
The statement is true, because the lines have an intersection point.
(1 point)
Responses
The statement is false, because the lines have an intersection point.
The statement is false, because the lines have an intersection point.
The statement is true, because the lines are parallel.
The statement is true, because the lines are parallel.
The statement is false, because the lines are parallel.
The statement is false, because the lines are parallel.
The statement is true, because the lines have an intersection point.
The statement is true, because the lines are parallel.
To explain further:
- The equation \( y = -x + 3 \) represents a line with a slope of -1 and a y-intercept of 3.
- The equation \( x + y = 8 \) can be rearranged to \( y = -x + 8 \), which is a line with the same slope of -1 but a different y-intercept (8).
Since both lines have the same slope (-1) but different y-intercepts (3 and 8), they are parallel and will never intersect. Therefore, there is no solution to the system of equations.