MCQ
A diver initially moving horizontally with speed v dives off the edge of a vertical cliff and lands in the water a distance d from the base of the cliff. How far from the base of the cliff would the diver have landed if the diver initially had been moving horizontally with speed 2v?
(A) d (B) sqrt(2d) (C) 2d (D) 4d
C
The time in the air for a horizontal projectile is dependent on the height and independent of the initial speed. Since the time in the air is the same at speed v and at speed 2v, the distance (d = vt) will be twice as much at a speed of 2v
A fan blows the air and gives it kinetic energy. An hour after the fan has been turned off, what has happened to the kinetic energy of the air?
(A) it disappears
(B) it turns into potential energy
(C) it turns into thermal energy
(D) it turns into sound energy
C
Total energy is always conserved so as the air molecules slow and lose their kinetic energy, there is a heat flow which increases internal (or thermal) energy
What to write on your paper if you have no clue what is going on in the question?
Fnet=ma
Has Mr.Bowles said this before?
"yeah right. I may be in my pajamas but I AM WORKING"
Yes! He actually Tweeted this in 2014!
Why are libraries so tall?
Because they have many stories!
A ball falls straight down through the air under the influence of gravity. There is a opposing force F on the ball with magnitude given by F = bv, where v is the speed of the ball and b is a positive constant. The ball reaches a terminal velocity after a time t. The magnitude of the acceleration at time t/2 is...
(A) Increasing
(B) Decreasing
(C) 10 m/s/s
(D) Zero
B
Since the ball’s speed is increasing from rest, the opposing force F is also increasing. The net force, which is the weight of the ball minus F, is thus decreasing. So the acceleration also must decrease. Time t /2 is before the constant-speed motion begins, so the acceleration has not yet decreased to zero.
A football is kicked off the ground a distance of 50 yards downfield. Neglecting air resistance, which of the following statements would be INCORRECT when the football reaches the highest point?
(A) all of the balls original kinetic energy has been changed into potential energy
(B) the ball’s horizontal velocity is the same as when it left the kickers foot
(C) the ball will have been in the air one-half of its total flight time
(D) the vertical component of the velocity is equal to zero
A
At the top, the ball is still moving (vx) so would still possess some kinetic energy.
How much time do you get per FRQ?
25 Minutes
What is Mr.Bowles best rating as a professor?
Getting a Chilly Pepper on "Rate my Professor"
(He taught a class with only men)
Why doesn't it hurt if someone throws a can of Coke at your head?
Because it's a soft drink!
A person stands on a merry-go-round which is rotating at constant angular speed. Which of the following are true about the frictional force exerted on the person by the merry-go-round? Select two answers.
(A) The force is greater in magnitude than the frictional force exerted on the person by the merry-go-round.
(B) The force is opposite in direction to the frictional force exerted on the merry-go-round by the person.
(C) The force is directed away from the center of the merry-go-round.
(D) The force is dependent on the person's mass.
B & D
Newton’s Third Law and Friction Force
Which of the following is true for a system consisting of a mass oscillating on the end of an ideal spring?
(A) The kinetic and potential energies are equal to each other at all times.
(B) The kinetic and potential energies are both constant.
(C) The maximum potential energy is achieved when the mass passes through its equilibrium position.
(D) The maximum kinetic energy and maximum potential energy are equal, but occur at different times.
C
Energy is conserved here and switches between kinetic and potential which have maximums at different locations.
For a design lab ,at least how many times should you repeat the procedures in your experiment?
Five
How many cats does Mr.Bowles have?
Four
Why did the boy do his homework on the plane?
He wanted a higher education!
A uniform meterstick of mass 0.20 kg is pivoted at the 40 cm mark. Where should one hang a mass of 0.50 kg to balance the stick?
(A) 16 cm (B) 36 cm (C) 44 cm (D) 46 cm
B
Mass of stick m1=0.20 kg at midpoint, Total length L=1.0 m, Pivot at 0.40 m, attached mass
m2=0.50 kg.
Applying rotational equilibrium Ʈnet=0
(m1g) • r1 = (m2g) • r2
(0.2) (0.1 m) = (0.5)(x) x = 0.04 m (measured away from 40 cm mark) gives a position on the stick of 36 cm
A car travels forward with constant velocity. It goes over a small stone, which gets stuck in the groove of a tire.
The initial acceleration of the stone, as it leaves the surface of the road, is
(A) vertically upward
(B) horizontally forward
(C) horizontally backward
(D) upward and forward, at approximately 45° to the horizontal
A
The first movement of the point of contact of a rolling object is vertically upward as there is no side to side (sliding) motion for the point in contact.
How can you prepare for the final exam?
Look over past exams, MCQ practice, labs, & AP Classroom.
What is Mr.Bowles Favorite Color?
PURPLE!
Where do fingers grow?
On palm trees!
A spring is compressed between two objects with unequal masses, m and M, and held together. The objects are initially at rest on a horizontal frictionless surface. When released, which of the following is true?
(A) The total final kinetic energy is zero.
(B) The two objects have equal kinetic energy.
(C) The speed of one object is equal to the speed of the other.
(D) The total final momentum of the two objects is zero.
D
Due to momentum conservation, the total before is zero therefore the total after must also be zero.
What happens to the force of gravitational attraction between two small objects if the mass of each object is doubled and the distance between their centers is doubled?
(A) It is doubled
(B) It is quadrupled
(C) It is halved
(D) It remains the same
D
F is proportional to each mass and inversely proportional to the distance between their centers squared. If each mass is doubled, F is quadrupled. If r is doubled F is quartered.
What are the FOUR types of FRQS that you will get?
Which National Park does Mr.Bowles wants to live when he retires?
Smoky Mountains
What did the beach say when the tide came in?
Long time no sea!