# Unit 2 Flashcards Preview

## Physics 1 > Unit 2 > Flashcards

Flashcards in Unit 2 Deck (17)
1
Q

Any object with a constant velocity has…

A

…no acceleration

2
Q

any object that IS experiencing an acceleration (of any kind) must have a…

A

…net force acting on it.

3
Q

acceleration equation

A

a = net force/mass = f/m (m/s^2)

4
Q

terminal speed

A

when air resistance and weight are in balance.

5
Q

air resistance equation

A

a = Fnet/m = (mg-R)/m where mg is weight, R is air resistance

6
Q

What causes an object to accelerate?

A

Unbalanced forces acting on an object.

7
Q

acceleration is directly proportional to…

A

net force

8
Q

acceleration is inversely proportional to…

A

1/mass

9
Q

The force of friction between surfaces depends on…

A

the kinds of material in contact and how much the surfaces are pressed together.

10
Q

pressure equation

A

pressure = force/area of application. Measured in pascals (Pa).

11
Q

air resistance

A

air resistance force ~ speed * front area

12
Q

terminal velocity

A

when terminal speed is together with the direction of motion.

13
Q

Force is always part of…

A

a mutual action that involves another (equal and opposite) force. Action/reaction forces.

14
Q

Action and reaction forces are…

A

equal in strength and opposite in direction

15
Q

Lift

A

The upward force that causes helicopters, birds, and airplanes to fly

16
Q

Newton’s Second Law

A

The acceleration of an object is proportional to the net force on the object and inversely proportional to the object’s mass.

17
Q

Force equation

A

F=ma = m*[(v1-v2)/t]