D & D
What is the standard unit for displacement?
meters (m)
If a car has a velocity of 0 m/s2 what is it doing?
It is not moving
What are the units for force?
Newtons (N)
What is the unit for power?
Watts (W)
What is the unit for energy?
Joules (J)
Is distance a scalar or vector quantity?
Scalar
Define acceleration
Acceleration = the rate that velocity changes over time
What is the formula for Force?
Force = mass x acceleration
What 2 things are required for work to occur?
1. Force applied
2. Displacement
What is kinetic energy?
The released energy of motion
If I do one full lap around a track, what is my displacement?
Zero
What are the units for velocity?
m/s2
What is Earth gravitational constant?
9.81 m/s2
What is the formula for work?
Work = Force x Displacement x cos (angle)
What are the 3 types of potential energy?
1. Gravitational PE
2. Elastic PE
3. Electromagnetic PE
What does a vector quantity require?
Magnitude (number) and Direction
What is the formula for velocity?
velocity = displacement / time
What are the 2 types of force?
1. Friction
2. Gravity
What 2 situations can have no work?
1. There is no displacement
2. Force applied and displacement are in different directions
What is mechanical energy?
The total energy of a system
If I run forward 5m and then backwards 10m, what is my displacement?
5m backwards
If my velocity is constant, then my acceleration is negative, positive, or zero?
Zero
What is tension?
The pulling or stretching of an object due to an applied force
When is work negative?
When the direction of displacement is OPPOSITE the direction of applied force.
When two like charges are brought together, the electromagnetic PE increases, decreases, or stays constant?
It increases