Changes in Motion
Force is what type of quantity?
What is a vector quantity ?
An object will not change its motion unless acted on by a what?
What is an unbalanced force ?
For every action, there is an
What is an equal and opposite reaction?
What is a measure of the gravitational force exerted on an object called?
What is weight ?
A car driving west going from 0 mph to 30 mph is doing what?
What is accelerating?
A vector quantity has both magnitude and what ?
What is direction?
The tendency of an object not to change its state of motion is called?
What is inertia?
The force acting on an object is equal to the mass of that object times its what?
What is acceleration?
If an object is placed perpendicularly to a desk what force is acting to keep the object on the desk?
What is Normal Force?
A change in the gravitational force acting on an object will affect the objects what?
What is weight?
The combination of Force and Direction results in what?
What is acceleration ?
The state in which the net force acting on an object is zero is called what?
What is Equilibrium?
The rate of acceleration of a vehicle is dependent on the mass of the vehicle and the what?
What is the force applied to the vehicle?
a resistive force that acts in a direction opposite to the direction of the relative motion of two contacting surfaces is called what ?
What is friction?
The length of a force vector represents the vectors what?
What is the magnitude of the vector?
A free-body diagram shows only the forces acting on ?
What is one object ?
Mass is the physical quantity used to measure what part of Newton's First Law of Motion?
What is inertia?
When a car is repelled when it collides with a wall is an example of which Newton's laws of motion?
What is Newtons Third law of Motion ?
a force that acts on an object in a direction perpendicular to the surface of contact is called a what force?
What is a normal force?
In order for an object to move, it must be acted on by a force greater than the object's what?
What is the object's mass?
A force acting at a distance is acting through a?
What is a force field?
The net force acting on an object is the vector sum of what forces act on an object?
What are all external forces acting on an object?
When two bodies exert forces on each other, the forces are equal in magnitude and opposite in direction. These forces are called an ?
What is an action-reaction pair?
The force of friction between two surfaces is proportional to what force?
If an object has a nonzero net force, then the object is what?
What is accelerating?