Physics Final- AP
A rope stretched between 2 fixed points can support transverse waves. What is the ratio of the 6th harmonic frequency to the 3rd?
2
A car slows down on a highway. Its engine is providing a forward force of 1000 N; the force of friction is 3000 N. It takes 20 s for the car to come to rest. What is the car's change in momentum during these 20 s?
40,000 kg*m/s
A simple harmonic oscillator has a frequency of 2.5 Hz and an amplitude of 0.05 m. What is the period of the oscillations?
0.4 s
Two traveling waves of equal frequency, one of amplitude 4 cm and the other of amplitude 6 cm, superimpose in a single medium. Which of the following best describes the displacement, D, of the resultant wave?
2 cm less than/equal to D less than/equal to 10 cm
A 0.30 kg bird is flying from right to left at 30 m/s. The bird collides with and sticks to a 0.50 kg ball which is moving straight up with speed 6.0 m/s. What is the magnitude of the momentum of the ball/bird combination immediately after collision?
9.5 N*S
Which of the following quantities is NOT a vector?
Electric Potential
A ball collides with a stationary block on a frictionless surface. The ball sticks to the block. Which of the following would NOT increase the force acting on the ball during the collision?
Increasing the time it takes the ball to change the block's speed
Sound waves travel at 350 m/s through warm air and at 3500 m/s through brass. What happens to the wavelength of a 700 Hz acoustic wave as it enters brass from warm air?
It increases by a factor of 10
What happens to the force of gravitational attraction between two small objects if the mass of each object is doubled and distance between their centers is doubled?
It remains the same
Wire Y is made of the same material but has twice the diameter and half the length of wire X. If wire X has a resistance of R then Wire Y would have a resistance of...
R/8
A uniform bar is lying on a flat table. Besides the gravitational and normal forces (which cancel), the bar is acted upon by two other force, F1 and F2, which are parallel to the surface of the table. If the net force on the rod is zero, then which of the following is true?
The net torque will be zero if F1 and F2 are applied at the same point
Two satellites are in circular orbit around the earth. The distanced from satellite 1 to earth's center is r1, and the distance from satellite 2 to the earth's center is r2, what is the speed of satellite 2?
v1 √(r1/r2)
