PHY 121 MC for Final Question and
answers rated A+ 2025
An object is projected up with an initial velocity (v) attains a height (H).
Another object projected up with initial velocity 2v will attain a height of?
a. 4H
b. 3H
c. 2H
d. H
e. 1.414 H - correct answer ✔4H
Which of the following is NOT one of the fundamental physical quantities in
the SI system?
a. mass
b. length
c. force
d. time
e. all are fundamental physical properties - correct answer ✔force
A projectile was fired at 35 degrees above the horizontal. At the highest point
in its trajectory, its speed was 200 m/s. The initial velocity has a horizontal
component of?
a. 0
b. 200 m/s (cos 35)
, c. 200 m/s (sin 35)
d. 200 m/s divided by cos 35
e. 200 m/s - correct answer ✔200 m/s
A baseball is hit upward and travels along a parabolic area before it strikes the
ground. Which one of the following statements is necessarily true?
a. the acceleration of the ball decreases as the ball moves upward
b. the velocity of the ball is 0 when the ball is at the highest point of the arc
c. the acceleration of the ball is 0 m/s^2 when the ball is at the highest point of
the arc
d. the x-component of velocity is the same throughout the ball's flight
e. the velocity of the ball is maximum when the ball is at the highest point in
the arc. - correct answer ✔the x-component of the velocity is the same
throughout the ball's flight
A rifle is aimed horizontally at the center of a large target 60 m away. The
initial speed of the bullet is 240 m/s. What is the distance from the center of
the target to the point where the bullet strikes the target?
a. 48 cm
b. 17 cm
c. 31 cm
d. 69 cm
e. 52 cm - correct answer ✔31 cm
Which of the following quantities is a vector quantity?
answers rated A+ 2025
An object is projected up with an initial velocity (v) attains a height (H).
Another object projected up with initial velocity 2v will attain a height of?
a. 4H
b. 3H
c. 2H
d. H
e. 1.414 H - correct answer ✔4H
Which of the following is NOT one of the fundamental physical quantities in
the SI system?
a. mass
b. length
c. force
d. time
e. all are fundamental physical properties - correct answer ✔force
A projectile was fired at 35 degrees above the horizontal. At the highest point
in its trajectory, its speed was 200 m/s. The initial velocity has a horizontal
component of?
a. 0
b. 200 m/s (cos 35)
, c. 200 m/s (sin 35)
d. 200 m/s divided by cos 35
e. 200 m/s - correct answer ✔200 m/s
A baseball is hit upward and travels along a parabolic area before it strikes the
ground. Which one of the following statements is necessarily true?
a. the acceleration of the ball decreases as the ball moves upward
b. the velocity of the ball is 0 when the ball is at the highest point of the arc
c. the acceleration of the ball is 0 m/s^2 when the ball is at the highest point of
the arc
d. the x-component of velocity is the same throughout the ball's flight
e. the velocity of the ball is maximum when the ball is at the highest point in
the arc. - correct answer ✔the x-component of the velocity is the same
throughout the ball's flight
A rifle is aimed horizontally at the center of a large target 60 m away. The
initial speed of the bullet is 240 m/s. What is the distance from the center of
the target to the point where the bullet strikes the target?
a. 48 cm
b. 17 cm
c. 31 cm
d. 69 cm
e. 52 cm - correct answer ✔31 cm
Which of the following quantities is a vector quantity?
