Chapter 1: Kinematics And Dynamics

Question 1

When adding vectors, always add

Answer 1

Tip to tail

Question 2

if the angle is between V and the x component, theta =

Answer 2

Theta = X/V —> X = V cos (theta) 
Theta = Y/V —> Y = V sin (theta)

Question 3

Dot product is A dot B =

Answer 3

|A| |B| cos (theta)

Question 4

Cross product A * B =

Answer 4

|A| |B| sin (theta)

Question 5

Instantaneous speed will always be equal to the

Answer 5

Magnitude of the objects instantaneous velocity

Question 6

Average velocity =

Answer 6

Delta x / delta t

Question 7

Units of Newton are

Answer 7

(kg * m) / s^2

Question 8

Gravitational force between two objects is Fg =

Answer 8

(Gm1m2) / r^2
G is 6.6710^-11 (Nm) / kg^2
m1 and m2 are masses of two objects
r is the distance between centers of mass

Question 9

Friction is a type of force that

Answer 9

Opposes the movement of objects

Question 10

Static friction (fs) exists between a

Answer 10

Stationary object and the surface upon which it rests

Question 11

Kinetic friction (fk) exists between a

Answer 11

Sliding object and the surface over which the object slides

Question 12

fk =

Answer 12

uk*N
uk is coefficient of kinetic friction
N is normal force

Question 13

Coefficient of static friction will always be ___ than coefficient of kinetic friction

Answer 13

Larger

Question 14

Weight of an object Fg =

Answer 14

m*g
m is mass
g is acceleration due to gravity

Question 15

Center of mass of a uniform object is at the

Answer 15

Geometric center of the object

Question 16

First law of Newton is

Answer 16

Fnet = m*a = 0
Fnet is net force
m is mass
a is acceleration

Question 17

Law of inertia states

Answer 17

A body either at rest or in motion with constant velocity will remain that way unless a new force acts upon it

Question 18

Newton’s second law

Answer 18

Fnet = ma

Question 19

Newton’s second law states

Answer 19

An object of mass m will accelerate when the vector sum of the forces result in some nonzero resultant force vector

Question 20

Newton’s third law

Answer 20

FAB = -FBA

Question 21

Newton’s third law states

Answer 21

To every action, there is always an opposed but equal reaction

Question 22

What are the linear motion equations

Answer 22

v = v0 + at 
x = v0t +(at^2) / 2
v^2 = v0^2 + 2ax 
x = vavg * t

Question 23

On an inclined plane Fg || =

Answer 23

mg sin (theta)

Question 24

In an inclined plane Fg perp =

Answer 24

mg cos (theta)

Question 25

Equation for circular motion is

Answer 25

Fc = (m*v^2) / r 
Fc is magnitude of centripetal force 
m is mass 
v is speed 
r is radius of circular path

Question 26

If there is no acceleration, there is no

Answer 26

Net force on the object

Question 27

Equation for torque is

Answer 27

tourqe = r x F = rFsin (theta)
r is length of lever arm
F is magnitude of force