PHYSICS 250 TEST BANK 2026 THEORY QUESTIONS AND VERIFIED SOLUTIONS GRADED A+

PHYSICS 250 TEST BANK 2026 THEORY
QUESTIONS AND VERIFIED SOLUTIONS
GRADED A+

◉ A spider lowers herself on a single strand of silk at constant
speed. Taking into account air resistance, which of the following
must be true?


Select one:
a.The tension in the silk is zero.
b.The tension in the silk equals the spider's weight.
c.The tension in the silk is greater than the spider's weight.
d.The tension in the silk is less than the spider's weight.. Answer:
d.The tension in the silk is less than the spider's weight.


◉ Given the vectors 𝐴→=6𝑖̂ +3𝑗̂ �→=6�^+3�^ and 𝐵→=𝑖̂ +9𝑗̂
�→=�^+9�^, find their scalar product 𝐴→⋅𝐵→�→⋅�→


Select one:
a. 𝐴→⋅𝐵→=6𝑖̂ +27𝑗̂
b. 𝐴→⋅𝐵→=45
c. 𝐴→⋅𝐵→=54𝑖̂ +27𝑗̂

,d. 𝐴→⋅𝐵→=33. Answer: d. 𝐴→⋅𝐵→ = 33


◉ Which is the definition of a derived unit?
Select one:
a. A unit which can be measured directly.
b. A unit which can not be measured directly.
c. A unit which is based on other (basic) units.
d. A unit which can be derived from a mathematical formula..
Answer: c. A unit which is based on other (basic) units.


◉ Torque is given by the formula, 𝜏→=𝐹→×𝑑→�→=�→×�→, where
𝐹→�→ is a force and 𝑑→�→ is a displacement. Which of the
following is the magnitude of torque resulting from a 2.4 N force
applied 17 cm from the point of rotation, if the force is applied
perpendicular to the displacement vector?


Select one:
a. 0 N⋅m
b. 40.8 N⋅m
c. 0.41 N⋅m
d. 4.1 N⋅m. Answer: c. 0.41 N⋅m

,◉ When a small car pulls a trailer for a move, which of the following
explains why the trailer moves?


Select one:
a. The car exerts a larger force on the trailer than the trailer does on
the car.
b. The action-reaction pair is in the linkage, which pulls the trailer
with larger force than that with which it pulls the car.
c. While the force of the trailer on the car is equal and opposite to
the force of the car on the trailer, the total of all forces acting on the
car are unbalanced.
d. The trailer will not move.. Answer: c. While the force of the trailer
on the car is equal and opposite to the force of the car on the trailer,
the total of all forces acting on the car are unbalanced.


◉ A Ferris wheel having a radius of 8 m has a velocity of 8 m / s. Is
there a danger of the riders flying off?


Select one:
a. Yes, the Ferris wheel is moving too fast
b. No the Ferris wheel is not moving too fast.
c. Possibly. It depends on the density of the air.
d. Possibly. It depends on the cross section of the riders.. Answer: b.
No the Ferris wheel is not moving too fast.

, ◉ A 3.5 kg object is placed on a frictionless incline as shown in the
diagram. The object's initial velocity is zero and it starts to slide
down the incline. What are the acceleration and final velocity of the
object when it reaches the ground level?


Select one:
a. a = 5.6 m / s2v = 8.9 m / s
b. a = 2.1 m / s2v = 14 m / s
c. a = 3.3 m / s2v = 21 m / s
d. a = 1.0 m / s2v = 17 m / s
e. None of the above. Answer: a. a = 5.6 m / s2v = 8.9 m / s


◉ If the formula for work is given by 𝑊= 𝐹→⋅𝑑→, how much work is
done by 60 N force which is applied as 25∘25∘ with respect to the 13
m displacement?


Select one:
a. 0 N⋅m
b. 330 N⋅m
c. 707 N⋅m
d. 780 N⋅m. Answer: c. 707 N⋅m