Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Physics - MCAT > Class Two > Flashcards

Class Two Flashcards

You may prefer our related Brainscape-certified flashcards:
MCAT flashcards Physics 101 flashcards AP® Physics flashcards
1
Q

what is the center of mass

A

point at which the mass of an object is concentrated

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

when is an object considered moving in a uniform circular motion

A

when it is moving in a circular path in a constant speed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

in uniform circular motion, is the velocity constant?

A

no

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

the acceleration of an object undergoing circular motion always..

A

points toward the center of the circle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what does centripetal mean

A

seeking the center - describes acceleration in UCM

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

v and a relationship - UCM

A

velocity is tangent & acceleration points towards the center of the circle → perpendicular

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

magnitude of centripetal acceleration

A

ac = v2 / r

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Fnet and acceleration always..

A

point in the same direction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what is centripetal force

A

net force directed toward the center that acts on an object to make it execute UCM

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Fc = mac =

A

mv2 / r

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what is torque

A

measure of a force’s effectiveness at making an object spin or rotate - accelerate rotationally

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what is the pivot point

A

point that does not move while the remainder of the object is rotation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what is the radius vector

A

vector between the center of rotation and the point of application of the force

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

the amount of torque a force provides depends on.. (3)

A

magnitude of F

length of r

angle ∅

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

torque formula

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

unit for torque

A

Newton x meter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

forces with no torque cannot..

A

increase or decreases the rotational speed of an object

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

which is negative? counterclockwise or clockwise?

A

negative: clockwise
positive: coutnerclockwise

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

lever arm method of calculating torque

A

measure the shortest distance from the pivot to the line along which F is applied

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

lever arm torque formula

A

torque = ∫ F

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

if a force acts at the pivot or along a line through the pivot..

A

the torque is zero

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

what does equilibrium mean in physics

A

zero acceleration (constant velocity)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

when is a system in static equilibrium

A

when velocity = 0

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

when is a system in translational equilibrium

A

if the forces cancel (Fnet = 0) → translational acceleration = 0

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

when is a system in rotational equilibrium

A

if the torques cancel (tnet = 0) → rotational acceleration = 0

26
Q

what measures an object’s inertia

A

mass → determines its resistance to accelerate

27
Q

the larger the mass, the ___ the inertia

A

higher

28
Q

what acts as translational inertia

A

mass

29
Q

what is necessary to produce rotational acceleration

A

torque

30
Q

what is necessary to produce translational acceleration

A

force

31
Q

the further away the mass is from the axis of rotation..

A

the greater the rotational inertia will be

32
Q

what determines rotational inertia

A

the distribution of an object’s mass relative to the axis of rotation

33
Q

torque is maximized when..

A

sin90 = 1

(F and r are perpendicular)

34
Q

in static equilibrium, the net torque is _ and the net force is _

A

zero and zero

35
Q

formula for work

A

W = Fd

36
Q

work by a constant force formula

A

W = Fdcos∅

∅ = angle between F and d

37
Q

what is power

A

measures how fast work gets done

38
Q

power formula

A

work / time

39
Q

what is kinetic energy

A

energy due to motion

40
Q

total work down on an object =

A

change in its kinetic energy

41
Q

what is potential energy

A

energy an object has by virtue of its position

42
Q

3 types of potential energy

A

gravitational, electrical & elastic

43
Q

change in gravitational potential energy: + mgh if..

A

the height of m is increased by h

44
Q

change in gravitational potential energy: - mgh if..

A

the height of m is decreased by h

45
Q

work done by gravity: path it follows

A

the work done by gravity depends only on the initial and final heights of the object, not on the path the objet follows

46
Q

what is a conservative force

A

only depends on the initial and final positions - not the path taken

47
Q

what force is a conservative force

A

gravity

48
Q

what is total mechanical energy

A

sum of an object’s kinetic + potential energy

49
Q

conversation of total mechanical energy

A

if the forces acting on an object are conservative, then the object’s total mechanism energy will remain the same throughout motion

50
Q

examples of simple machines

A

inclined planes, pulleys, levers etc.

51
Q

mechanical advantage

A

effort/applied force to be decreased

52
Q

mechanical advantage formula

A

resistance force / effort force

53
Q

efficiency formula

A

W output / energy input

54
Q

momentum formula

A

p = mv

mass x velocity

55
Q

impulse momentum theorem formula

A

j = delta p (momentum)

56
Q

law of conservation of momentum

A

delta p sustem = 0

aka total p initial = total p final

57
Q

two types of collisions

A

elastic and inelastic

58
Q

when is a collision elastic

A

when the total kinetic energy is conserved (alongside momentum)

59
Q

when is a collision inelastic

A

when the total kinetic energy is not conserved

60
Q

what is a perfectly inelastic collision

A

when the objects stick together afterwards

61
Q

angular momentum formula

A

L = lmv = Iw

Physics - MCAT (6 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions