University Physics Final Flashcards
Does not include numerical questions, just conceptual (22 cards)
(Position vs Time graph) Velocity relates to?
Slope direction
(Position vs Time graph) Speed relates to?
Slope intensity
M and Z dive into a lake, M drops down and Z gets a running start. Who hits the lake first?
They hit the lake at the same time
M and Z dive into a lake, M drops down and Z gets a running start. Who has a greater speed entering the lake?
Z will have a greater speed
You slam on your brakes while driving and a cake slams into the windshield. What force caused the cake to fly?
No force
Apple sits on a table. Force on the apple by the table is equal to the weight of the apple. Which of N’s laws is being applied here?
First Law
Person moving downward in and elevator on a scale. If the elevator is speeding up what will the scale read?
Less than what they weigh
Person moving downward in and elevator on a scale. If the elevator is moving at a constant speed down, what will the scale read?
Whatever the person weighs
A heavy object and a light object are pushed on a frictionless table with the same force for the same distance. Which has a larger Kinetic Energy at the end of the push?
They are equal
A heavy object and a light object are pushed on a frictionless table with the same force for the same distance. Which one has a larger speed at the end of the push?
The lighter object
Z pulls a sled in level ground for 2.0m. There is friction. What is the sign of the work done by the pull force of Z?
Positive
Z pulls a sled in level ground for 2.0m. There is friction. What is the sign of the work done by the frictional force?
Negative
Z pulls a sled in level ground for 2.0m. There is friction. What is the sign of the work done by the force due to gravity?
Zero
M lifts a toy from the ground over his head. During this, what is the sign of the work done by gravity and what happens to the gravitational potential energy?
Work by gravity is negative and grav pull is increased
A spring is stretched 3.0m. It is then stretched to 6.0m. By how much does the elastic potential energy change?
Four times larger
(2^2=4)
M pushes an empty wagon with a constant force for 20.0m and 10.0s. Z jumps in the wagon and M pushes with twice the force for the same distance in 20.0s. What is the relation of work between the two pushes?
M did 2x as much work when Z was in the wagon
M pushes an empty wagon with a constant force for 20.0m and 10.0s. Z jumps in the wagon and M pushes with twice the force for the same distance in 20.0s. What is the relation M’s power?
M had the same amount of power in both pushes
Bouncy ball and billiards ball have equal mass. Dropped from the same height. Bouncy ball bounces, and billiards ball sticks to the floor. Which ball has a greater impulse?
Bouncy Ball
A person sits on a spinning stool that has no friction, with her arms extended. When she pulls her arms in, what happens(increase/decrease) to her moment of inertia and her angular speed?
Moment of inertia decreases and angular speed increases
An input force is applied to the master cylinder of a lift. Then slave cylinder is 3x larger in diameter than the master cylinder. What is the output force of the lift?
9F
A piece of paper hanging over the edge of a table. A person blows horizontal on top of the paper. What happens to the paper?
It rises
A piece of wood floats in water with 72% of it submerged. What is the average density of the wood?
720 kg/m^3
