Net Force
This is the sum of all forces acting on the object.
What is the net force?
This law states that an object at rest stays at rest, and an object in motion stays in motion with a constant velocity unless acted on by an unbalanced force.
What is Newton’s First Law of Motion?
Seat belts prevent you from being __ from a vehicle in a collision.
Where is ejected (or thrown outside of)?
Newton's Second Law states that an object’s acceleration is equal to the net force on the object divided by its ___.
What is mass?
Friction is a force that ___ the motion between two surfaces that are touching.
What is opposes?
For this reason, it is important to find the net force on an object.
What is to predict how an object’s motion will change?
An object with a net force that is not equal to 0 N has these types of forces.
What are unbalanced forces?
Why were "ease of use" and "comfort" important criteria for Nils Bohlin's safer seat belts?
What is wanting people to use them correctly and consistently? (The answer does not need to be stated exactly this way.)
This is what each letter in the formula for Newton's Second Law Stands for.
What are F=Force, M=Mass, and A=Acceleration?
This is an example of how friction can be helpful.
What is helping people walk without slipping and allowing vehicles to grip the road? (Other correct examples will also be accepted.)
A car accelerates with an applied force of 200 N and is opposed by a frictional force of 50 N in the opposite direction. The net force is this.
What is 150 N?
This is the net force on a stationary object.
What is 0 N?
The ___ on Nils Bohlin’s solution to safer seat belts were that they needed to be inexpensive and easy to make.
What are constraints?
If acceleration is the same, what will be required to move an object with greater mass than an object with less mass?
What is GREATER FORCE?
This is an example of a person using fluid friction.
What is skydiving, drag on an airplane, surfing? (Or any other correct example)
This is the net force of two people pushing a refrigerator across the room when one person pushes with a force of 24 N and the other pushes with a force of 78 N.
What is 102 N?
When an unbalanced force acts on an object, the object will do this.
What is accelerate?
Holding both upper and lower parts of a body in place during a collision, ease of use, and comfort are the __ of Nil's Bohlin's solution.
What are the criteria?
If the same force is used, the object with the smallest mass will accelerate in this way.
What is that it will accelerate more or faster?
Rubbing your hands together is an example of this type of friction.
What is sliding friction?
Three children are playing tug-of-war with two people on one side and one on the other. On the left side of the rope, one child pulled with a force of 50 N, and the other pulled with a force of 70 N. The third child pulled on the right side of the rope with a force of 110 N. The net force of the rope is this.
What is 10 N to the left?
Forces on an object in motion can be balanced when the object is moving at the...
What is the same speed and in the same direction?
These two strong body parts distribute the force of the impact of a collision across them with the new seat belt design.
What are the pelvis and sternum?
This is how you can rearrange the formula for Newton's Second law with force isolated. (F=...)
What is f=ma (Force equals mass times acceleration.)
These two factors affect the amount of friction between two surfaces.
What are the surface textures and the mass of the object?