Mechanics in Physics

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What is the primary focus of the branch of physics known as mechanics?

The study of matter and its properties

The study of electricity and magnetism

The study of forces and their effects on bodies at rest and in motion (correct)

The study of energy and its effects

Which of the following is an example of the application of the science of mechanics?

The study of the structure of atoms

The work done in pumping water to a supply tank (correct)

The study of the properties of light

The study of the behavior of gases

What is the main difference between statics and dynamics?

Statics deals with forces, while dynamics deals with motion

Statics deals with motion, while dynamics deals with forces

Statics deals with rigid bodies at rest, while dynamics deals with rigid bodies in motion (correct)

Statics deals with non-rigid bodies, while dynamics deals with rigid bodies

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 Signup and view all the answers

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 Signup and view all the answers

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 Signup and view all the answers

What is the force of the earth's gravity acting on a mass of 1 kg?

9.81 N Signup and view all the answers

What is the direction of the force of gravity acting on an object on the earth's surface?

Downward Signup and view all the answers

What is the magnitude of the force due to the earth's gravity acting on a mass of 200 kg?

1962 N Signup and view all the answers

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 Signup and view all the answers

What is the reason for the Canadian Standards Association's recommendation to avoid using the term 'weight'?

Because it is often used incorrectly Signup and view all the answers

What does the acceleration due to gravity vary with according to the text?

The location of the object Signup and view all the answers

What is the unit of mass in the SI system?

Kilogram Signup and view all the answers

Which quantity is defined as the rate of change in position that occurs during a given time?

Velocity Signup and view all the answers

What is the SI unit for force?

Newton Signup and view all the answers

Acceleration due to gravity is approximately how much per second?

$9.81 : m/s^2$ Signup and view all the answers

If a body moves from the 10 m position to the 30 m position in 4 seconds, what is its velocity?

$5 : m/s$ Signup and view all the answers

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 Signup and view all the answers

What does a velocity of $5 : m/s$ signify?

Displacement Signup and view all the answers

What is the relationship between force, mass, and acceleration?

Force = mass * acceleration Signup and view all the answers

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?

$5 : kg$ Signup and view all the answers

What is the rate of acceleration if a body changes velocity from $20 : m/s$ to $50 : m/s$ in 5 seconds?

$30 : m/s^2$ Signup and view all the answers