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Kinematics/ Dynamics
Motion (circular, rotational, harmonic)
Collisions
Waves
Electrostatics and Circuits
100
If a car travels 20 meters in 5 seconds what is its velocity?
4 m/s
100
A 76-kg pilot at an air show performs a loop de loop with his plane. At the bottom of the 52-m radius loop, the plane is moving at 48 m/s. Determine the normal force acting upon the pilot A) 3 x 10^2 N B) 4.1 x 10^3 N C)11.5 x 10^5 N D)5.6 x 10^3 N
B) 4.1 x 10^3 N
100
A 4.0-kg ball is moving with a speed of 6.0 m/s directly toward a 2.0 kg ball which is at rest. The two balls collide and stick together. What is their velocity immediately after the (inelastic) collision? A) 5.5 m/s B) 4 m/s C) 12 m/s D) 8.7 m/s
B) 4 m/s
100
A geological disturbance in California produces seismic waves which are detected in Phoenix, approximately 99 km from the epicenter. If the waves travel 6.3 m/s, determine the time delay between the disturbance and the detection.
157 seconds
100
A wire W1 of some resistance is connected to a battery with potential V, and dissipates a power P1. A second wire W2 twice as long as W1 is connected to the same battery, and dissipates a power twice that of P1. This means... a)The wires are the same material b)The resistance of W1 must be less than that of W2 c)The potential supplied by the battery has increased d)The current supplied by the battery has increased
D) The current supplied by the battery has incrased
200
An airplane accelerates down a runway at 3.20 m/s2 for 32.8 s until is finally lifts off the ground. Determine the distance traveled before takeoff.
1720 meters
200
a 5.00 kg block hung on a spring causes a 10.0 cm elongation of the spring. What is the restoring force exerted on the block by the spring? A) 49 N B) 61 N C) 10 N D) 22 N
A) 49 N
200
A bullet with a mass of 0.020 kg collides inelastically with a wooden block of mass 2.5 kg, initially at rest. After the collision, the bullet + block has a speed of 1.2 m/s. What was the initial speed of the bullet? A) 150 m/s B) 75 m/s C) 100 m/s D) 90 m/s
A) 150 m/s
200
Sound waves in air travel at approximately 330m/s. Calculate the frequency of a 2.5m-long sound wave. A) 101 Hz B) 132 Hz C) 125 Hz D) 289 Hz
B) 132 Hz
200
An electric field does 4J of work on a charged particle, moving it from a potential of 1V to a potential of 3V. The particle has a charge of a) -8 C b) +8 C c) -2 C d) +0.5 C e) -0.5 C
C) -2 C
300
A child throws a ball downward from a tall building. Note that the ball is thrown, not dropped and disregard air resistance. What is the acceleration of the ball immediately after it leaves the child's hand?
9.8 x 10 meters/second^2
300
A 1,000kg car moving at 10m/s rounds a circular turn at a constant speed. The circular turn has a radius of 20 meters. What is the magnitude of the car's centripetal acceleration during the turn? a) .5m/s^2 b) 2m/s^2 c) 5m/s^2 d) 500m/s^2
C) 5m/s^2
300
Two grocery carts collide, a full one with a mass of 35 kg moving East at 2 m/s and an empty one with a mass of 10 kg moving West at 3 m/s. After the collision the full cart is moving East at 0.75 m/s. What is the velocity of the empty cart? A) 2 m/s B) 5.3 m/s C) 4 m/s D) 1.375 m/s
C) 1.375 m/s
300
A wave on a certain guitar string travels at a speed of 200m/s. Calculate the wavelength of an “A” note sounding at 440Hz. A) .78 m B) .40 m C) .89 m D) .45 m
D) .45 m
400
A feather is dropped on the moon from a height of 1.40 meters. The acceleration of gravity on the moon is 1.67 m/s2. Determine the time for the feather to fall to the surface of the moon.
1.29 seconds
400
A car crests the top of a circular hill, maintaining a constant speed as it does so, and not losing contact with the rod during the process. How does the normal force that the road exerts on the car compare to the car's weight during the moment the car is at the top of the hill? a) The normal force is greater than weight b) The normal force equals weight c) The normal force is less than weight d) Needs more info
C) The normal force is less than weight
400
A cart with mass 0.340 kg moving on a frictionless linear air track at 1.2 m/s strikes a second cart of unknown mass at rest. The collision between the two carts is elastic. After the collision, the first cart continues in its original direction at 0.66 m/s. a) What is the mass of the second cart? A) 25.2 g B) 55.3 g C) 100 g D) 98.7 g
D) 98.7 g
400
A sound wave traveling at 350 m/s has a frequency of 500 Hz. What is its wavelength? A) .89 m B) .34 m C) .7 m D) .12 m
C) .7 m
500
A block weighing 80 N rests on a plane inclined at 30 degrees to the horizontal. The coefficients of static and kinetic friction are 0.2 and 0.1 respectively. What is the minimum magnitude of the force F, parallel to the plane, that will prevent the block from slipping?
26 N
500
How fast should the earth spin in order for a 150 lb human not to be able to walk on the ground? (the Earth's radius is 6.4x10^6 meters)
.0012 rads/sec
500
Two cars have a ‘rear end’ collision. A 1200 kg Honda moving at 20 m/s strikes a 1000 kg Ford moving at 15 m/s. Their bumpers become locked and they continue to move as one mass. What is their final velocity? A) 17.73 m/s B) 20 m/s C) 13.56 m/s D) 4.23 m/s
A) 17.73 m/s
500
Light of wavelength 497.0 nm appers to have a wavelength of 500.2 nm when it reaches eart from a distance star. find the velocity of the star if the speed of light is 300000000 m/s. A) 3.3 x 10^2 m/s B) 2 x 10^6 m/s C) 1.1 x 10^7 m/s D) 2.6 x 10^2 m/s
B) 2 x 10^6 m/s
500
Two spheres, one with a charge of -Q and the other with a charge of +2Q are separated by a distance R, and exert a force F on each other. The spheres are now altered so that the force between them is 2F. Which of the following would have produced this result? a) The charge on both spheres was doubled b) The charge on only one sphere was increased by a factor of 4 c) The charge on both spheres was doubled, and the distance between them halved d) The charge on only one sphere was halved, and the distance between them halved e) The charge on both spheres was increased by a factor of 4, and distance between them doubled
d) The charge on only one sphere was halved, and the distance between them halved