Physics Vocab
Motion
Forces
Energy
Momentum & Collisions
100
A place or object used for comparison to determine if an object is in motion is called a) reference point b) constant speed c) velocity d) distance
a) reference point
100
Average speed is calculated by dividing ____. a) velocity/time b) acceleration/time c) distance/time d) displacement/time
c) distance/time
100
The force that opposes the weight of an object resting on a flat surface is the _____ force. a) friction b) normal c) gravitational d) magnetic
b) normal
100
A ball held at the top of a slide has ________________.
a) potential energy b) kinetic energy c) work d) chemical energy
a) potential energy
100
The total momentum of a ______ is conserved.
a) collision b) closed system c) open system
b) closed system
200
A ________ has both magnitude and direction.
a) vector b) scalar c) position d) reference point
a) vector
200
An object has a negative acceleration, this means it is ______.
a) slowing down b) speeding up
a) slowing down
200
If gravity did NOT affect the path of a horizontally thrown ball, the ball would ____. a) go straight up b) fall straight down c) follow a curved path d) travel horizontally
d) travel horizontally
200
When you kick a soccer ball it has __________ energy.
a) kinetic b) potential c) mechanical d) chemical
a) kinetic
200
The total kinetic energy of the system is conserved in an ______ collision. (KEi = KEf)
a) elastic b) inelastic c) explosion d) perfectly inelastic
a) elastic
300
Energy is the ability to do ________.
a) nothing b) potential c) inertia d) work
d) work
300
What would constant velocity look like on a position vs time graph? a) curved line b) horizontal line only c) straight line
c) straight line
300
The upward force on an object falling through the air is a) inertia b) air resistance c) momentum d) terminal velocity
b) air resistance
300
A volleyball, bowling ball, ping pong ball, and a marble are rolling down a slope. The ball with the greatest kinetic energy is ________.
What is the bowling ball?
300
If the velocity of an object doubles, the momentum _____.
also doubles (remember p = mv)
400
__________ is the tendency of an object to keep moving or stay at rest.
a) friction b) force c) inertia d) gravity
c) inertia
400
The path of projectile motion is a) curved b) always horizontal c) always vertical d) straight
d) curved
400
The size of the gravitational forces between two objects depends on their a) frictional forces b) inertia c) masses and distance between them d) speed and direction
c) masses and distance between them
400
The formula to find kinetic energy is _____.
KE = (1/2)mv2
400
Which two conditions must be met in order to have a closed (isolated) system?
constant mass; The mass of the system must remain constant during the interaction.
net force = 0; The net external force on the system must be zero.