Balanced and Unbalanced Forces - JSS2 Basic technology Past Questions and Answers - page 2
In a force diagram, if all the arrows are equal in length but opposite in direction, the forces are:
Unbalanced
Balanced
Random
Nonexistent
Which of the following scenarios involves balanced forces?
A car slowing down at a red light
A rocket launching into space
A book resting on a shelf
A ball rolling down a hill
When you let go of a stretched rubber band, it snaps back due to:
Balanced forces
Unbalanced forces
Magnetic forces
Constant velocity
During a tug of war, if one team suddenly pulls harder and the other team starts to move, the forces are now:
Balanced
Decreasing
Unbalanced
Increasing
What effect do balanced forces have on an object already in motion?
It speeds up
It slows down
It changes direction
It continues moving at the same velocity
Which of the following best describes balanced forces?
Balanced forces occur when two forces acting on an object are equal in magnitude and opposite in direction. This balance results in no net force on the object, causing it to remain at rest if initially stationary, or to continue moving at a constant velocity if already in motion. It illustrates a state of equilibrium where the forces cancel each other out.
What happens to an object when balanced forces act on it?
When balanced forces act on an object, the object experiences no change in its state of motion. If the object is at rest, it remains stationary. If the object is moving at a constant velocity, it continues to move at that velocity. Balanced forces result in an absence of acceleration because the net force is zero.
Unbalanced forces result in:
Unbalanced forces result in a net force acting on an object, causing it to accelerate in the direction of the greater force. This acceleration can involve starting to move from rest, changing speed, changing direction, or any combination of these. Unbalanced forces are necessary to change an object's state of motion according to Newton's Second Law of Motion.
In a tug of war, if both teams pull with equal force and the rope does not move, the forces are:
If both teams pull with equal force and the rope does not move, the forces are balanced. This means the forces exerted by each team cancel each other out. There is no net force acting on the rope, resulting in no movement.
Which of the following is an example of unbalanced forces?
A car accelerating on a highway is an example of unbalanced forces. When the driver presses the accelerator, the engine applies a greater force to the car than the forces resisting its motion (like friction and air resistance). This results in a net force that causes the car to accelerate, changing its speed and potentially its direction.