APP1 Exam Final Review

Relationships

100

Newton’s Laws: If mass is constant, as force increases, ________ also increases

Acceleration

200

Kinetic Energy: If mass is constant, as velocity increases, kinetic energy changes _________ (directly/inversely/exponentially)

Exponentially

300

Momentum: If mass is constant, as momentum increases, ________ also increases

Velocity

400

Rotation: If angular momentum is constant, as moment of inertia increases, angular velocity ____________

Increases

500

Fluids: If the speed of the fluid increases, ________ decreases.

Pressure

Graphs

100

If we have a position - time graph. What does the slope represent?

Velocity

200

If we have a velocity - time graph. What does the slope represent?

Acceleration

300

If we have a force - time graph. What does the area represent?

Impulse

400

If we have a velocity - time graph. What does the y-intercept represent?

Initial Velocity

500

If we have an acceleration-time graph. What does a straight, horizontal line across the graph represent?

Constant acceleration

Fill-in-the-blank formulas

100

F = ___ * a

m (mass)

200

X = ___ t + (1/2)at²

v₀ (initial velocity)

300

F_G = ___ * (m₁m₂ / r²)

What number is this variable equal to?

G (gravitational constant)

G = 6.67 x 10^-11

400

_____ = F * t

J

500

T (torque) = ____ * a (angular acceleration)

I (moment of inertia)

True or False (misconceptions)

100

True or False: You walk one lap around a 0.25 mi track. Both your distance and displacement are 0.25 mi.

False. Displacement will be 0.

200

True or False: Acceleration and velocity are always in the same direction.

False. An acceleration in the opposite direction of velocity indicates slowing down.

300

True or False: A positive acceleration does not tell you if the car is speeding up or slowing down.

True. A positive acceleration indicates a net force in the positive direction, but not necessarily if it is speeding up or slowing down. If the car is moving in the negative direction, it is slowing down. If the car is moving in the positive direction, it is speeding up.

400

True or False: I push on a wall for 30 minutes and eventually stop because I am exhausted. I did work on the wall.

• False - I applied a force but the force did not cause the wall to move a distance so no work was done on the wall.

500

True or False: Maximum torque occurs when the force is parallel to the line connecting the axis of rotation to the point the force is applied.

False: if the force is parallel to the line drawn between axis of rotation and the force applied, the torque is zero. Max torque occurs when the force is perpendicular to r.

Rearrangin Equations

100

F = m*a

M = ?

• M = F / A

200

F_{net, y} = -F_g + F_n + F_{app, y}

F_n = ?

F_n = F_{net, y} + F_g - F_{app, y}

300

P_abs = P₀ + ⍴gh

h = ?

h = (Pabs - P0)/⍴g

400

v_f = v₀ + at

t = ?

t = (v_f - v₀) / a

500

½*m*v² = m*g*h

v = ?

v = sqrt(2gh)