Final Assessment | Quizerry

Final Assessment >> How Things Work: An Introduction to Physics

only by the puppy on the right.

by both puppies, but most was provided by the puppy on the right.

only by the puppy on the left.

in equal amounts by the two puppies.

the car did not exert enough leftward force on the cellphone to make the cellphone accelerate with the car.

the cellphone’s weight pulled the cellphone out the window.

the dashboard of the turning car tilted sharply to become a ramp and the downhill ramp force pushed the cellphone out the window.

the car exerted a rightward centrifugal force on the cellphone that pushed the cellphone out the window.

in the uphill direction.

in the upward direction.

zero.

in the downhill direction.

The force that you’re exerting on the desk must be equal in amount but opposite in direction to the force that the floor is exerting on it.

The amount of force that you’re exerting on the desk must be more than the amount of force that friction is exerting on it.

The amount of force that you’re exerting on the desk must be equal to the amount of its weight.

The amount of force that you’re exerting on the desk must be more than the amount of its weight.

now elastic potential energy in the disk.

still present in the disk, as it must be because kinetic energy is conserved and can’t be created or destroyed.

now thermal energy in the disk and playing surface.

now gravitational potential energy in the disk.

Forward (horizontal)

Upward (vertical).

Downhill (in the direction of your velocity).

Upward and forward (between vertical and horizontal).

1 point

less momentum to the block than it would have if you had not been wearing socks.

less velocity to the block than it would have if you had not been wearing socks.

the same momentum, whether or not you are wearing socks, but that transfer takes more time when you are wearing socks.

less energy to the block than it would have if you had not been wearing socks.

is motionless and horizontal.

is motionless and may be horizontal or tilted.

has a constant angular velocity, which may be zero.

has an angular velocity that is gradually decreasing toward zero.

the dog lands first, but the cat lands considerably farther from the wall than the dog does.

both animals land at approximately the same time, but the cat lands considerably farther from the wall than the dog does.

the dog lands first, but both animals land at approximately the same distance from the wall.

both animals land at approximately the same time and at approximately the same distance from the wall.

10.A skateboarder rides swiftly up the edge of a bowl-shaped surface and leaps into the air. While in the air, the skateboarder flips upside and tosses the skateboard from hand to hand. The skateboarder then rides safely back down the bowl. During the time that the skateboarder and skateboard are not touching anything, one aspect of their motion that is constant is their total (or combined) [note: neglect any effects due to the air]

1 point

momentum.

angular velocity.

velocity.

angular momentum.

zero and its acceleration is downward.

downward and its acceleration is zero.

downward and its acceleration is downward.

zero and its acceleration is zero.

it pushes up on your foot just as hard as your foot pushes on it, unlike the soft dry sand.

it barely moves downward as you push downward on it, so you do almost zero work on it.

it stops the downward motion of your foot faster and thus absorbs less of your momentum.

it stops the downward motion of your foot faster and thus absorbs more of your momentum.

the boy reaches the water before the girl.

the two children reach the water at the same moment and but the girl travels farther from the dock than does the boy.

the girl reaches the water before the boy.

the two children reach the water at the same moment and at the same distance from the dock.

14.It is a beautiful summer day and the residents of a high-rise apartment building are eating dinner on their balconies. A resident accidently knocks an empty glass off a balcony that is about 80 meters (260 feet) above the cement patio. The glass would have smashed on that patio after falling for 4 seconds, however, a quick-witted resident catches the glass after it has fallen for only 2 seconds. How far above the patio was the glass when it was caught?

1 point

Approximately 40 meters above the patio.

Approximately 30 meters above the patio.

Approximately 60 meters above the patio.

Approximately 50 meters above the patio.

1 point

When that pedal is accelerating.

As that pedal moves downward.

As that pedal moves upward.

As that pedal moves either upward or down.

Its weight.

Its weight along with a steadily decreasing upward force.

Its weight along with an upward force that steadily decreases until the club reaches its highest point. After that point, there is only the constant downward force of gravity.

A steadily decreasing upward force from the moment it leaves the juggler’s hands until it reaches its highest point and then a steadily increasing downward force as the club returns toward the jugglers hands.

a torque that is less than the torque the lighter child is exerting.

a force that is equal in amount but oppositely directed to the force the lighter child is exerting.

a torque that is equal in amount but oppositely directed to the torque the lighter child is exerting.

a force that is less than the force the lighter child is exerting.

remain in the middle of the subway car.

shift toward the side of the subway car (perpendicular to the direction of its velocity).

shift toward the back of the subway car (opposite its velocity).

shift toward the front of the subway car (in the direction of its velocity).

retains approximately all of its momentum but transfers most of its energy to the wall.

retains approximately all of its energy and momentum.

retains approximately all of its energy but transfers most of its momentum to the wall.

retains approximately all of its energy but transfers more forward momentum than it had to the wall.

decreases the platform’s angular velocity.

makes it easier to change the platform’s angular velocity.

makes it harder to change the platform’s angular velocity.

increases the platform’s angular velocity.

a downhill force of 80 N on you.

a downhill force of somewhat more than 80 N on you.

a downhill force of somewhat less than 80 N on you.

no downhill force on you at all.

Final Assessment >> How Things Work: An Introduction to Physics

Related Questions & Answers:

Leave a Comment Cancel reply