22 Questions
What is the primary focus of the branch of physics known as mechanics?
The study of forces and their effects on bodies at rest and in motion
Which of the following is an example of the application of the science of mechanics?
The work done in pumping water to a supply tank
What is the main difference between statics and dynamics?
Statics deals with rigid bodies at rest, while dynamics deals with rigid bodies in motion
According to Newton's First Law of Motion, what will happen to an object if no external force acts upon it?
It will continue in its state of rest or uniform motion
What is the direction of the force produced by an object in response to an external force, according to Newton's Third Law of Motion?
In the opposite direction of the external force
What is the result of applying a large enough force to an object, such that friction is overcome?
The object will begin to increase in speed
What is the force of the earth's gravity acting on a mass of 1 kg?
9.81 N
What is the direction of the force of gravity acting on an object on the earth's surface?
Downward
What is the magnitude of the force due to the earth's gravity acting on a mass of 200 kg?
1962 N
Why does the SI system use the kilogram as a unit of measurement instead of the newton?
Because the newton is a unit of force, not mass
What is the reason for the Canadian Standards Association's recommendation to avoid using the term 'weight'?
Because it is often used incorrectly
What does the acceleration due to gravity vary with according to the text?
The location of the object
What is the unit of mass in the SI system?
Kilogram
Which quantity is defined as the rate of change in position that occurs during a given time?
Velocity
What is the SI unit for force?
Newton
Acceleration due to gravity is approximately how much per second?
$9.81 : m/s^2$
If a body moves from the 10 m position to the 30 m position in 4 seconds, what is its velocity?
$5 : m/s$
Which concept is defined as any action on a body that tends to change its size, shape, or its state of rest or motion?
Force
What does a velocity of $5 : m/s$ signify?
Displacement
What is the relationship between force, mass, and acceleration?
Force = mass * acceleration
If an unknown mass is found to be accelerating at $10 : m/s^2$ under the influence of a $2 N$ force, what must be the mass?
$5 : kg$
What is the rate of acceleration if a body changes velocity from $20 : m/s$ to $50 : m/s$ in 5 seconds?
$30 : m/s^2$
Test your knowledge of mechanics, a branch of physics that deals with forces and their effects on bodies at rest and in motion. Learn about statics and dynamics with questions on various scenarios involving forces.
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