PHYS 101: GENERAL PHYSICS I
FINAL QUESTIONS AND
ANSWERS WITH
RATIONALES/GRADED A+/2026
UPDATE/100% CORRECT
/INSTANT DOWNLOAD
Section 1: Kinematics in 1D & 2D (Questions 1–12)
1. A car accelerates uniformly from rest to 30 m/s in 10 seconds. What is the distance
traveled?
• A) 100 m
• B) 150 m
• C) 150 m (Rationale: s=12(u+v)t=0.5 ∗30 ∗10=150 ms=21
(u+v)t=0.5∗30∗10=150m)
• D) 300 m
2. A ball is thrown straight upward with an initial speed of 20 m/s. How long does it
take to return to its original height? (g = 10 m/s²)
• A) 2 s
• B) 4 s (Rationale: Total time of
flight T=2u/g=40/10=4 sT=2u/g=40/10=4s)
• C) 6 s
• D) 8 s
3. A projectile is launched at 40° above horizontal. At the top of its trajectory, the
acceleration is:
• A) 0
• B) 9.8 m/s² downward
, • C) 9.8 m/s² downward (Rationale: Gravity acts vertically throughout motion;
horizontal velocity constant but vertical acceleration constant)
• D) Depends on launch speed
4. A stone is dropped from a cliff and hits the ground in 5 s. What is the height of the
cliff? (g = 9.8 m/s²)
• A) 49 m
• B) 98 m
• C) 122.5 m (Rationale: h=12gt2=0.5×9.8×25=122.5 mh=21
gt2=0.5×9.8×25=122.5m)
• D) 245 m
5. Two vectors have magnitudes 6 and 8. The magnitude of their resultant cannot be:
• A) 2
• B) 10
• C) 14
• D) 15 *(Rationale: Max resultant = 6+8=14; min = |8-6|=2; 15 is impossible)*
6. An object moves along a circular path of radius 5 m with constant speed 10 m/s.
Centripetal acceleration is:
• A) 2 m/s²
• B) 20 m/s² (Rationale: ac=v2/r=100/5=20 m/s2ac=v2 /r=100/5=20m/s2 )
• C) 50 m/s²
• D) 0
7. A ball is thrown horizontally at 15 m/s from a height of 20 m. How far horizontally
does it land? (g=10 m/s²)
• A) 15 m
• B) 30 m (Rationale: Time to fall t=2h/g=4=2 st=2h/g=4=2s; range
= 15×2=30 m15×2=30m)
• C) 45 m
• D) 60 m
8. The area under a velocity-time graph represents:
• A) Acceleration
• B) Displacement (Rationale: Integral of velocity gives displacement)
• C) Force
• D) Impulse
, 9. A particle’s position is x(t)=3t2−2t+1x(t)=3t2−2t+1 (m). What is its velocity at
t=2 s?
• A) 6 m/s
• B) 8 m/s
• C) 10 m/s *(Rationale: v=dx/dt=6t−2v=dx/dt=6t−2 ; at
t=2, 12−2=1012−2=10)*
• D) 14 m/s
10. In projectile motion without air resistance, the horizontal component of velocity:
• A) Increases
• B) Decreases
• C) Remains constant (Rationale: No horizontal acceleration)
• D) Changes direction
11. An airplane drops a package while flying horizontally at constant speed. Ignoring
air resistance, the package will land:
• A) Directly below the plane’s initial position
• B) Slightly behind the plane’s final position (Rationale: Package retains
forward velocity; plane moves forward during fall, so package lands behind the
plane)
• C) Directly below the plane’s final position
• D) Ahead of the plane
12. A runner completes one lap (400 m) in 50 seconds. Average velocity is:
• A) 8 m/s
• B) 0 m/s *(Rationale: Displacement = 0 after full lap)*
• C) 4 m/s
• D) 50 m/s
Section 2: Newton’s Laws & Dynamics (13–24)
13. A 5 kg box is pulled horizontally with 20 N force. Friction is 5 N. Acceleration is:
• A) 1 m/s²
• B) 3 m/s² (Rationale: Fnet=20−5=15 NFnet
=20−5=15N; a=15/5=3 m/s2a=15/5=3m/s2)
• C) 4 m/s²
FINAL QUESTIONS AND
ANSWERS WITH
RATIONALES/GRADED A+/2026
UPDATE/100% CORRECT
/INSTANT DOWNLOAD
Section 1: Kinematics in 1D & 2D (Questions 1–12)
1. A car accelerates uniformly from rest to 30 m/s in 10 seconds. What is the distance
traveled?
• A) 100 m
• B) 150 m
• C) 150 m (Rationale: s=12(u+v)t=0.5 ∗30 ∗10=150 ms=21
(u+v)t=0.5∗30∗10=150m)
• D) 300 m
2. A ball is thrown straight upward with an initial speed of 20 m/s. How long does it
take to return to its original height? (g = 10 m/s²)
• A) 2 s
• B) 4 s (Rationale: Total time of
flight T=2u/g=40/10=4 sT=2u/g=40/10=4s)
• C) 6 s
• D) 8 s
3. A projectile is launched at 40° above horizontal. At the top of its trajectory, the
acceleration is:
• A) 0
• B) 9.8 m/s² downward
, • C) 9.8 m/s² downward (Rationale: Gravity acts vertically throughout motion;
horizontal velocity constant but vertical acceleration constant)
• D) Depends on launch speed
4. A stone is dropped from a cliff and hits the ground in 5 s. What is the height of the
cliff? (g = 9.8 m/s²)
• A) 49 m
• B) 98 m
• C) 122.5 m (Rationale: h=12gt2=0.5×9.8×25=122.5 mh=21
gt2=0.5×9.8×25=122.5m)
• D) 245 m
5. Two vectors have magnitudes 6 and 8. The magnitude of their resultant cannot be:
• A) 2
• B) 10
• C) 14
• D) 15 *(Rationale: Max resultant = 6+8=14; min = |8-6|=2; 15 is impossible)*
6. An object moves along a circular path of radius 5 m with constant speed 10 m/s.
Centripetal acceleration is:
• A) 2 m/s²
• B) 20 m/s² (Rationale: ac=v2/r=100/5=20 m/s2ac=v2 /r=100/5=20m/s2 )
• C) 50 m/s²
• D) 0
7. A ball is thrown horizontally at 15 m/s from a height of 20 m. How far horizontally
does it land? (g=10 m/s²)
• A) 15 m
• B) 30 m (Rationale: Time to fall t=2h/g=4=2 st=2h/g=4=2s; range
= 15×2=30 m15×2=30m)
• C) 45 m
• D) 60 m
8. The area under a velocity-time graph represents:
• A) Acceleration
• B) Displacement (Rationale: Integral of velocity gives displacement)
• C) Force
• D) Impulse
, 9. A particle’s position is x(t)=3t2−2t+1x(t)=3t2−2t+1 (m). What is its velocity at
t=2 s?
• A) 6 m/s
• B) 8 m/s
• C) 10 m/s *(Rationale: v=dx/dt=6t−2v=dx/dt=6t−2 ; at
t=2, 12−2=1012−2=10)*
• D) 14 m/s
10. In projectile motion without air resistance, the horizontal component of velocity:
• A) Increases
• B) Decreases
• C) Remains constant (Rationale: No horizontal acceleration)
• D) Changes direction
11. An airplane drops a package while flying horizontally at constant speed. Ignoring
air resistance, the package will land:
• A) Directly below the plane’s initial position
• B) Slightly behind the plane’s final position (Rationale: Package retains
forward velocity; plane moves forward during fall, so package lands behind the
plane)
• C) Directly below the plane’s final position
• D) Ahead of the plane
12. A runner completes one lap (400 m) in 50 seconds. Average velocity is:
• A) 8 m/s
• B) 0 m/s *(Rationale: Displacement = 0 after full lap)*
• C) 4 m/s
• D) 50 m/s
Section 2: Newton’s Laws & Dynamics (13–24)
13. A 5 kg box is pulled horizontally with 20 N force. Friction is 5 N. Acceleration is:
• A) 1 m/s²
• B) 3 m/s² (Rationale: Fnet=20−5=15 NFnet
=20−5=15N; a=15/5=3 m/s2a=15/5=3m/s2)
• C) 4 m/s²
