Ch. 3 pt 1- Flashcards
In English system, the most common unit of pressure is __.
pounds per square inch (psi)
T/F: A large change in an object’s state of motion may result from a small force acting for a relatively long time or from a large force acting for a relatively short time.
True
__ is mass per unit of volume.
Density
What are the 2 common units of pressure in the metric system?
Pascal and N per square centimeter (N/cm^2)
In the context of volume, identify an accurate statement about one liter.
1l = 1000 cm^3
What are the 2 units of torque?
Newton-meter and Foot-pound
The product of force and the time over which the force acts is known as __.
impulse
In the metric system, a common unit of density is the __.
kilogram per cubic meter (kg/m^3)
__ is the rotary effect of a force.
Torque
The tendency of a body to resist a change in its state of motion is known as __.
inertia
The common unit of mass in the metric system is the __.
kilogram (kg)
A hockey puck will continue to slide across the ice after being hit by a player. This phenomenon is an example of __.
inertia
T/F: The direction in which weight acts is always toward the center of the earth.
True
What are the 3 common units of volume in the metric system?
Cubic centimeters, Cubic meters, and Liters
T/F: Force is the product of mass and acceleration.
True
Newton is the amount of force required to __.
accelerate 1 kg of mass at 1m/s^2 OR (1kg)(1m/s^2)
Algebraically, the product of force and the perpendicular distance from the force’s line of action to the axis of rotation is known as __.
torque
The mechanical definition of __ is resistance to acceleration.
inertia
Any object, body, or body part that is being focused upon for analysis is known as a(n) __ __.
free body
The resultant force derived from the composition of 2 or more forces is known as __ __.
net force
A body’s __ is the point around which the body’s weight is equally balanced, no matter how the body is positioned.
center of gravity
Algebraically, mass multiplied by the acceleration of gravity equals __.
weight
A soccer ball lying motionless on the floor has a tendency to remain motionless unless it is acted upon by an external force. This is an example of __.
inertia
The English unit of mass is the __.
slug
The force per unit of area over which force acts is known as __.
pressure
__ can be thought of as a push or pull acting on a body.
Force
In the metric system, the most common unit of force is the __.
newton
A sketch that shows a defined system in isolation with all of the force vectors acting on the system is known as a __.
free body diagram
The vector sum of all of the acting forces is known as __.
net force
