Kinematics & Dynamics

Question 1

’s that have magnitude & direction, & #’s that have only magnitude are known as what ? respectively

Answer 1

Vectors (velocity displacement, acceleration, & force

Scalars (distance, speed, energy, pressure, & mass)

Question 2

A unitless quantity that is dependent on 2 materials in contact is known as ?

Answer 2

Coefficient of static friction

Question 3

The component of force between 2 objects in contact that is perpendicular to the plane of contact between the object & the surface upon which it rests is known as ?

Answer 3

Normal force

Question 4

What is the difference between mass & weight ?

Answer 4

Mass is a measure of a body’s inertia (matter), while weight is a measure of gravitational force on mass

Question 5

Acceleration opposite the initial velocity may be called ?

Answer 5

Deceleration

Question 6

A body or object at rest or in motion w/ constant v will remain that way unless Fnet acts upon is the basis of what concept ?

Answer 6

Newton’s 1st law (law of inertia)

Question 7

An object will accelerate when the sum of the vectors is some nonzero resultant is the basis of what concept ?

Answer 7

Newton’s 2nd law

Question 8

For every action there is an equal & opposed reaction is the basis of which concept ?

Answer 8

Newton’s 3rd law

Question 9

Translational equilibrium exists only when the vector sum of all the forces acting on an object is what value ?

Answer 9

0 (1st condition of equilibrium)

Question 10

The moment of force is known as ?

Answer 10

Torque