conceptual questions - final

you 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?

Answer explanation

it increases

consider 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?

Answer explanation

the aluminum

object 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?

Answer explanation

the buoyancy force on both objects is the same

a 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?

Answer explanation

the period remains unchanged

a 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?

Answer explanation

the period doubles

a 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?

Answer explanation

the period remains unchanged

a 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?

Answer explanation

the period increases

a 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?

Answer explanation

it is zero

a 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?

Answer explanation

it is maximum

a 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?

Answer explanation

it is zero