Force Concepts
What is the definition of force in physics?
What is a push or pull on an object?
An object is in _________ if it is moving in a straight line at constant speed. This includes an object remaining at rest.
What is equilibrium?
An object’s acceleration is in the direction in which forces are __________.
What is Unbalanced?
Momentum is equal to _________ times velocity
What is mass?
The force that opposes the motion of two surfaces sliding past each other is called ________.
What is friction?
This diagram includes a labeled arrow representing each force. Each arrow begins on the object and points in the direction in which the force acts.
What is a free-body diagram?
Forces acting on an object in equilibrium are ________.
What is balanced?
The equation form of Newton's Second Law is ________.
What is Fnet=ma?
In an elastic collision, mechanical energy of the system is ____________.
What is conserved?
The force that acts perpendicular to the surface of an object in contact with another surface is called the ________ force.
What is normal?
The unit of force in the International System of Units (SI) is the ________.
What is the newton (N)?
When you push on a wall, the wall pushes back with ________ force.
What is equal?
The net external force on an object is the vector sum of all ________ acting on the object.
What are forces?
An object moving at constant speed v in a circle of radius r has an acceleration of magnitude v2/r, directed toward the _______ of the circle.
What is center?
The pulling force transmitted along a rope, string, or cable is called ________.
What is tension?
An object is in equilibrium if the net external force acting on it is ________.
What is zero?
If an objects forces are balanced, its velocity is ________.
What is constant?
If a constant, nonzero force is applied to an object, the object will have a constant ________.
What is acceleration?
The component of the object’s weight parallel to the incline is _________.
What is mgsinθ?
The force exerted by a compressed or stretched spring upon any object that is attached to it is called ________ force.
What is spring?
On earth’s surface, the gravitational field (g) is _________.
What is 10 N/kg.
Newton’s Third Law says that the force of object A on object B is ________ to the force of object B on object A.
What is equal?
A person of mass 80 kg stands on a platform scale in an elevator which is moving up and increasing speed. Is the reading in the scale greater than, less than, or equal to 800 N?
What is greater?
If earth is not included in the system, what type of energy can never be included?
What is gravitational potential?
The force of earth acting on an object is also known as its ________.
What is weight?