Chapter 1- Kinematics And Dynamics

Question 1

Units for Newton

Answer 1

kg m / s^2

mass*gravity

Question 2

Units for joule

Answer 2

kg m^2 / s^2

forcedistancecos&

Question 3

Units for watt

Answer 3

kg m^2 / s^3

Question 4

Gravitational force between two objects

Answer 4

Fg = Gm1m2 / r^2

G: 6.67 x 10^-11
r: distance between their centers of mass

Question 5

Static friction

Answer 5

0

Question 6

Kinetic friction

Answer 6

fk = ukN

uk- coefficient of kinetic friction
N- normal force

Question 7

Static friction vs kinetic friction coefficients

Answer 7

Static will always be larger than kinetic

Question 8

Inertia

Answer 8

Newton’s first law. Object in motion(or rest) wants to stay in motion (or rest).

Question 9

Parallel component (in direction of movement)

Answer 9

mg sin(&)

Question 10

Perpendicular component (y component)

Answer 10

mg cos(&)

Question 11

Centripetal force

Answer 11

mv^2 / r

Question 12

Centripetal acceleration

Answer 12

v^2 / r

Question 13

Translational equilibrium

Answer 13

Exists only when vector sum of all the forces acting on an object is zero. May be still or constant velocity

Question 14

Torque

Answer 14

rF sin(&)

r- length of lever arm

Question 15

Rotational equilibrium

Answer 15

Not rotating at all (usually on MCAT) but actually when all torques equal 0