Balanced vs. Unbalanced
Question:BALANCED vs. UNBALANCED
These forces have a net force of 0.
What are balanced forces?
An unbalanced force always causes this to change.
What is an object's motion or velocity?
Two students push equally hard on opposite sides of a box. The net force is this. You must include the measurement for force.
Ex. measurement for length > 4cm
What is 0 N?
A hockey puck is moving at 53 m/s. No forces act on it. Its speed remains this.
What is 53 m/s?
Question: BALANCED vs. UNBALANCED
An object is sitting still, and the forces acting on it are equal and opposite. These are the forces acting on the object.
What are balanced forces?
Question:
A cart is moving to the right. A force pushes it to the right, and the cart moves faster. What happens to the cart's velocity.
What is it increases / the cart speeds up?
Two students push on opposite sides of a box. The box moves toward Hailey. This student's force must have been stronger.
The person pushing the box toward Hailey.
When the forces on a moving object are balanced, its velocity does this.
What is remains constant?
BALANCED vs. UNBALANCED
A moving object begins to slow down. The forces acting on it must be these.
What are unbalanced forces?
Question:
A moving sled experiences a force in the opposite direction of its motion. The sled will most likely do this.
What is slow down?
A cart moves at 2 m/s to the right. It is pushed again to the right and begins speeding up. The additional push is this type of force.
What is an unbalanced force?
TRUE or FALSE: If an object is moving, the forces acting on it must be unbalanced.
False. An object can move with balanced forces if it is moving at a constant velocity.
Balanced forces can cause an object to do these TWO things.
What are remain at rest OR move at a constant speed in the same direction?
Name the FIVE ways an unbalanced force can change an object's velocity.
What are speeding up, start, stop, slowing down, and changing direction?
TRUE or FALSE: An unbalanced force always causes an object to start moving.
False. An unbalanced force can also cause an object to speed up, slow down, or change direction.
A car travels north at a constant speed. The forces are balanced. The car will continue doing this.
What is moving north at the same constant speed?
A delivery truck is traveling west at a constant speed. The engine pushes the truck forward while friction and air resistance push backward with an equal total force.
Which statement best describes the truck?
A. The forces are unbalanced, so the truck speeds up west.
B. The forces are balanced, the net force is 0 N, and the truck continues at constant velocity.
C. The forces are balanced, so the truck must stop moving.
D. The forces are unbalanced, so the truck changes direction.
B. The forces are balanced, the net force is 0 N, and the truck continues at constant velocity.
A skateboarder is moving north. An unbalanced force acts toward the south, but the skateboarder is still moving north immediately afterward.
What is most likely happening?
A. The skateboarder is speeding up.
B. The skateboarder is slowing down.
C. The skateboarder must immediately move south.
D. The skateboarder's velocity is not changing.
B. The skateboarder is slowing down.
A kayak is moving east. A paddler applies a force of 18 N east, while water resistance applies a force of 11 N west.
Which statement is correct?
A. The net force is 29 N east, so the kayak moves at constant velocity.
B. The net force is 7 N east, so the forces are unbalanced and the kayak's velocity changes.
C. The net force is 7 N west, so the kayak slows down.
D. The net force is 0 N, so the kayak remains at rest.
B. The net force is 7 N east, so the forces are unbalanced and the kayak's velocity changes.
A drone is flying forward at a constant speed of 12 m/s. The drone's propellers continue to provide a forward force, but air resistance provides an equal force backward.
Which statement best explains the drone's motion?
A. The drone speeds up because a forward force is acting on it.
B. The drone slows down because air resistance is acting on it.
C. The net force is 0 N, so the drone continues moving at 12 m/s in the same direction.
D. The drone stops because the forces cancel.
C. The net force is 0 N, so the drone continues moving at 12 m/s in the same direction.