with Complete Solutions 2025-2026
Updated.
D - Answer An object is moving with constant non-zero velocity. Which of the following
statements about it must be true?
A) A constant force is being applied to it in the direction of motion.
B) A constant force is being applied to it in the direction opposite of motion.
C) A constant force is being applied to it perpendicular to the direction of motion.
D) The net force on the object is zero.
E) Its acceleration is in the same direction as it velocity.
D - Answer A push of magnitude P acts on a box of weight W as shown in the figure. The
push is directed at an angle θ below the horizontal, and the box remains a rest. The box rests on
a horizontal surface that has some friction with the box. The friction force on the box due to the
floor is equal to
A) W.
B) W + P.
C) W + P cos θ.
D) W + P sin θ.
E) W - P sin θ.
, https://ufonline.findlay.edu/bbcswebdav/pid-1990955-dt-content-rid-5983105_2/courses/
PHYS250_01_SP2018/PHYS250_01_SP2018_ImportedContent_20171215094843/
PHYS250_01_FA2017_ImportedContent_20170810104912/force_on_box1%281%29.PNG
D - Answer The motions of a car and a truck along a straight road are represented by the
velocity-time graphs in the figure. The two vehicles are initially alongside each other at time t =
0. At time T, what is true of the distances traveled by the vehicles since time t = 0?
A) They will have traveled the same distance.
B) The truck will not have moved.
C) The car will have travelled further than the truck.
D) The truck will have travelled further than the car.
https://ufonline.findlay.edu/bbcswebdav/pid-1990955-dt-content-rid-5983092_2/courses/
PHYS250_01_SP2018/PHYS250_01_SP2018_ImportedContent_20171215094843/
PHYS250_01_FA2017_ImportedContent_20170810104912/area_under_velocity.PNG
A - Answer A person who normally weighs 700 N is riding in an elevator that is moving
downward but slowing down at a steady rate. If this person is standing on a bathroom scale
inside the elevator, what would the scale read?
A) more than 700 N
B) less than 700 N
C) 700 N
D) It could be more or less than 700 N, depending on whether the magnitude of the
acceleration is greater than or less than 9.8 m/s2.
8.37 ± 3% - Answer You observe two people pushing a crate ( unknown mass) across a level
surface that has a coefficient of kinetic friction with the box of 0.287. If the crate has a constant
acceleration of 3.81, and one of the people is pushing with force 29.7 N and the other person is
pushing with force 25.7 N, what is the mass of the box?