34 questions

- 1. Open Endedyou are at camp over the summer and there is a wooden raft that is floating in a lake. you and enough of your friends hop on the raft to completely submerge it. what happens to the buoyant force on the raft?
- 2. Open Endedconsider a wooden object floating in water. an aluminum and a steel object sink. the wooden and aluminum blocks are the same size. the aluminum and steel blocks have equal mass, and the density of steel is greater than noted density of aluminum. which object has the greatest buoyancy force on it?
- 3. Open Endedobject A and B have identical size and shape, but object A has a much higher density. the two objects are completely submerged in water. what is true about the buoyancy force?
- 4. Open Endeda simple pendulum, consisting of a mass on a string with length L, is undergoing small oscillations with amplitude A. the mass is increased by a factor of four. what is true about the period?
- 5. Open Endeda simple pendulum, consisting of a mass on a string with length L, is undergoing small oscillations with amplitude A. the length is increased by a factor of four. what is true about the period?
- 6. Open Endeda simple pendulum, consisting of a mass on a string with length L, is undergoing small oscillations with amplitude A. the amplitude is doubled. what is true about the period?
- 7. Open Endeda simple pendulum, consisting of a mass on a string with length L, is undergoing small oscillations with amplitude A. the pendulum is taken to the moon. what is true about the period?
- 8. Open Endeda mass is connected to a spring and is allowed to move horizontally. the mass is at a position L when the spring is un-stretched. the mass is then moved, stretching the spring, and released from rest. it then moves with simple harmonic motion. at the instant that the mass passes through the position where the spring is un-stretched, what can be said about its instantaneous acceleration?
- 9. Open Endeda mass is connected to a spring and is allowed to move horizontally. the mass is at a position L when the spring is un-stretched. the mass is then moved, stretching the spring, and released from rest. it then moves with simple harmonic motion. at the instant that the mass passes through the position where the spring is un-stretched, what can be said about its instantaneous speed?
- 10. Open Endeda mass is connected to a spring and is allowed to move horizontally. the mass is at a position L when the spring is un-stretched. the mass is then moved, stretching the spring, and released from rest. it then moves with simple harmonic motion. at the instant that the spring is compressed the most, what can be said about the magnitude of its instantaneous velocity?
- 11. Open Endedwhat is true about waves
- 12. Open Endedwhat is true about all mechanical traveling waves
- 13. Open Endedwhat is true about the wavelength of a mechanical wave
- 14. Open Endedin a mechanical wave, the restoring force is the force that actually causes the oscillation. in which direction does a restoring force act?
- 15. Open Endedstringed instruments such as violins rely on the vibrations of strings to create specific frequencies. when a violin string is plucked, which of the following occurs when the string is displaced by its greatest amount
- 16. Open Endeda heavy string does not respond as quickly to a disturbance as a light string. why?
- 17. Open Endedwhat type of wave is created through a battering ram when it hits a wall
- 18. Open Endedtrue/false: a standing wave only occurs with transverse motion
- 19. Open Endeda frog leaps vertically into the air and encounters no appreciable air resistance. what is true about the frog's motion?
- 20. Open Endeda car traveling at a velocity v takes a distance d to stop after the brakes are applied. what is the stopping distance if the car initially travels at a velocity 2v? assume that the acceleration due to braking is the same in both cases.
- 21. Open Endeda person gives a box a shove so that it slides up a ramp, then reverses its motion and slides down. the direction of the force of friction is?
- 22. Open Endeda small sports car collides head on with a massive truck. which vehicle experiences the greater impact force?
- 23. Open Endeda ball can be rolled down one of three different ramps. the change in height is the same for all three ramps (even though they have different bumps/curves). ignoring friction, for which ramp will the speed of the ball be the highest at the bottom?
- 24. Open Endeda constant net torque is applied to an object. what will be constant throughout the motion of the object? assume that the object does not deform or change shape
- 25. Open Endeda wheel starts spinning from rest with uniform angular acceleration. if its angular speed at the end of the first three seconds is w1, then at the end of 6 seconds, its angular speed will be?
- 26. Open Endedliquid flows through a pipe as shown in the pic. the pipe's diameter changes in a way that you do not know because you cannot see into the pipe. however, you can see the level of liquid in some vertical pipes that are attached to the main pipe. rank in order from largest to smallest the flow speeds
- 27. Open Endedconsider a brick that is totally immersed in water. the long edge of the brick is vertical. the pressure on the brick is
- 28. Open Endedcube A and cube B have the same mass. the length of one side of cube A is twice the length of one side of cube B. how do the densities of the two cubes compare?
- 29. Open Endedtwo balls are thrown upward, ball P at an angle of 42 above the horizontal and ball Q at an angle of 64 above the horizontal. both are thrown at the same initial speed. which ball stays in the air longer? ignore air resistance
- 30. Open Endeda car is traveling to the right with a constant speed of 10 m/s, what is the net force on it?
- 31. Open Endedtwo go-karts are moving in opposite directions and collide. what can you definitively say about the two cars after collision?
- 32. Open Endedyou need to make a sharp turn on a flat road, making a radius of curvature of 15 meters. the centripetal force is provided by the static friction between the tires and the road as you turn the wheel. how does the required force of static friction between your tires and the road compare if you make the turn at 15 mph vs 30 mph?
- 33. Open Endedfluid flowing through a horizontal pipe comes to a section where the diameter of the pipe gets larger. compared with their values before the pipe widens, what happens to the speed of the fluid and the pressure in the fluid at the point where the pipe widens?
- 34. Open Endeda uniform sphere is compressed to half of its original diameter. the volume of a sphere is given by V = (4/3)pi r^3, where r is the radius of the sphere. what can you say about its mass and density?
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