Term

Definition


Term

Definition


Term

Definition


Term

Definition


Term
SI unit for Work and Energy 

Definition
Joule (J) which equals (N/m) 


Term

Definition


Term
Give Prefix and abbreviation for powers of ten (9, 6, 3, 2, 3, 6, 9, 12) 

Definition
Giga (G or B), Mega (M), Kilo (K), Centi (c), Milli (m), Micro (u), Nano (n), Pico (p) 


Term
Give Sin value for the following angles: 0, 30, 45, 60, 90, 180 

Definition
0, 1/2, !2/2=0.7, !3/2=0.87, 1, 0 


Term
Give Cos value for the following angles: 0, 30, 45, 60, 90, 180 

Definition
1, !3/2=0.87, !2/2=0.7, 1/2, 0, 1 


Term
What is the difference between a scalar quantity and a vector quantity? 

Definition
A scalar quantity has magnitude but no direction. A vector quantity has magnitude and direction. 


Term
Vector or Scalar: distance, speed, displacement, mass, velocity, force, acceleration, energy Pressure, mass 

Definition
distance=s, speeds, displacement=v, mass=v, velocity=v, force=v, acceleration=v, energy=s, Pressure=s, mass=s 


Term
(T/F) The sum of two vectors is the resultant of the vectors 

Definition


Term
A person walks 2 miles north then turns around and walks 3 miles south. Total time elapsed1 hour. Find the distance, displacement, avg. velocity, avg. speed 

Definition
distance=5 miles displacement=1 mile south avg. velocity=1mi/hr (S) avg. speed=5 mi/hr 


Term
Average acceleration (a)= 

Definition
change in velocity / change in time 


Term
For a body under constant acceleration, v= 

Definition
v=initial velocity + (a)(t) 


Term
Is weight a vector or scalar quantity? What is the formula for calculating weight? 

Definition


Term
What is Newton's First Law? 

Definition
1. Law of inertia; body in motion or at rest stay in motion or at rest unless a net force acts upon it. 


Term
What is Newton's Second Law of Motion? 

Definition


Term
What is Newton's third law of motion? 

Definition
To every force there is an equal and opposite force; Fb = =Fa 


Term
What are the formulas for the initial horizontal and vertical velocities of a projectile launched with speed v at an angle of theta to the horizontal? 

Definition
Horizontal velocity= v(cos theta) Vertical velocity = V(sin theta) 


Term
What does the total horizontal distance, x, traveled by a projectile equal? 

Definition
x = (initial horizontal velocity)(time in the air) 


Term
What is the formula for gravitational force? F=? 

Definition
F = [(gravity)(mass of obj. 1)(mass of obj. 2)] / (distance between the two objects squared) 


Term
If the distance between two objects is doubled, by how much is the force of gravity increased or decreased? 

Definition
It would decrease by a factor of 4 (2 squared) 


Term
(T/F) A body in translational equilibrium has a net force moving it at a constant velocity. 

Definition
False, a body in translational equilibrium has no net force acting on it. 


Term
If a lever arm is halved, by how much does the torque increase or decrease? 

Definition
Torque would decrease by half. 


Term
Formula for calculating torque = 

Definition
torque = [(r, distance between force and axis of rotation)(F, force)(sin theta)] 


Term
When calculating torque, which rotation direction is considered positive and which negative? 

Definition
Counterclockwise=positive Clockwise = negative 


Term
(T/F) For rotational equilibrium to occur, the sum of all torques acting on a body must be zero. 

Definition


Term
Define Translational motion. 

Definition
motion in which the position of the object's center of mass changes as a function of time 


Term
Formula for the force of static friction = 

Definition
static friction = (coefficient of static friction)(Normal force, N) 


Term
Formula for the force of kinetic friction = 

Definition
kinetic friction =(Coefficient of kinetic friction)(Normal force, N) 


Term
What is the formula for centripetal acceleration for a body in uniform circular motion? 

Definition
a = (Velocity squared) / (radius, r) 


Term
What is the formula for centripetal force for a body in uniform motion? 

Definition
F = ma = [(mass)(velocity squared)] / (radius) 


Term
(T/F) For a planet orbiting a star, the centripetal force is equal to the gravitational force. 

Definition


Term
What is the formula for Work? 

Definition
W = (Force)(distance)(cos theta) 


Term
What is the unit of work? 

Definition
Joule (J) which is equal to a N/m 


Term
What is the formula for power? 

Definition


Term
What is the unit of power? 

Definition
Watt (W) which is equal to (1 Joule/sec) 


Term
What is the formula for kinetic energy? 

Definition
KE = (mv squared)/2
***mv is mass times velocity 


Term
What are the units of Kinetic energy? 

Definition


Term
What is the formula for gravitational potential energy? U = ? 

Definition
U = (mass)(gravity)(Height) 


Term
What are the units of gravitational potential energy? 

Definition


Term
(T/F) The total mechanical energy of a body is the sum of its kinetic and potential energies. 

Definition


Term
Is total mechanical energy a constant if the only forces that act on a body are conservative (E=K+U=constant)? 

Definition
If only conservative forces act on a body then change in E = 0. 


Term
What is the formula for momentum? p=? 

Definition


Term
What is the formula for impulse? J = ? 

Definition
J = (force)(time) = Ft=mv(initial mv) =change in p 


Term
Is kinetic energy conserved in a completely elastic collision? 

Definition


Term
(T/F) Net external force must equal zero for conservation of momentum to occur 

Definition


Term
What is the formula for the center of mass for two masses, m1 and m2, lying along the xaxis at points x1 and x2? X=? 

Definition
X = [(m1x1)+(m2x2)] / (m1 + m2) 


Term
(T/F) Momentum is not conserved in an inelastic collision. 

Definition
False, momentum is conserved in both elastic and inelastic collisions. 

