PHYS 250 BUNDLED EXAMS 2026 EXAM
SCRIPT FULL QUESTIONS AND CORRECT
SOLUTIONS GRADED A+
⩥ An objects speed is increased by a factor of three.
What does this do to kinetic energy? Answer: The kinetic energy
increases by more than a factor of three.
⩥ A student is trying to push a fridge into a dorm room, but the fridge is
not moving.
Is the student exerting a force on the fridge? Answer: yes
⩥ A student is trying to push a fridge into a dorm room, but the fridge is
not moving.
Is any work being done on the fridge? Answer: no
⩥ A student is trying to push a fridge into a dorm room, but the fridge is
not moving.
, Is any power being delivered to the fridge while the student is pushing?
Answer: no
⩥ Consider trying to lift a box tied to a rope from the ground to a first-
floor window.
Will it require more power to lift this box in two seconds or in two
hours? Answer: Two seconds
⩥ A 500 lb steel beam is lifted up by a crane to a height of 100 ft and is
held there.
How much work is being done to hold the beam in place? Answer: No
work is being done to hold it in place
⩥ You stand on the edge of a very tall building with three rocks, which
you are going to throw off the edge. You throw the first rock straight
outwards, the second rock at an angle 60° above the horizontal, and the
third rock 30° below the horizontal.
If you throw all three rocks with the same initial speed, which will be
moving the fastest when it hits the ground? Answer: They will have the
same speed
SCRIPT FULL QUESTIONS AND CORRECT
SOLUTIONS GRADED A+
⩥ An objects speed is increased by a factor of three.
What does this do to kinetic energy? Answer: The kinetic energy
increases by more than a factor of three.
⩥ A student is trying to push a fridge into a dorm room, but the fridge is
not moving.
Is the student exerting a force on the fridge? Answer: yes
⩥ A student is trying to push a fridge into a dorm room, but the fridge is
not moving.
Is any work being done on the fridge? Answer: no
⩥ A student is trying to push a fridge into a dorm room, but the fridge is
not moving.
, Is any power being delivered to the fridge while the student is pushing?
Answer: no
⩥ Consider trying to lift a box tied to a rope from the ground to a first-
floor window.
Will it require more power to lift this box in two seconds or in two
hours? Answer: Two seconds
⩥ A 500 lb steel beam is lifted up by a crane to a height of 100 ft and is
held there.
How much work is being done to hold the beam in place? Answer: No
work is being done to hold it in place
⩥ You stand on the edge of a very tall building with three rocks, which
you are going to throw off the edge. You throw the first rock straight
outwards, the second rock at an angle 60° above the horizontal, and the
third rock 30° below the horizontal.
If you throw all three rocks with the same initial speed, which will be
moving the fastest when it hits the ground? Answer: They will have the
same speed
