AP Physics 1: Uniform Motion Questions for Exam Prep

📚 Quick Study Guide

Uniform motion, also known as constant velocity motion, describes the movement of an object traveling in a straight line at a constant speed. Here's a breakdown:

• 📏 Displacement: The change in position ($\Delta x = x_f - x_i$).
• ⏱️ Time Interval: The duration of the motion ($\Delta t = t_f - t_i$).
• 🚗 Velocity: Constant velocity is defined as displacement divided by the time interval ($v = \frac{\Delta x}{\Delta t}$). Since it's uniform, the average and instantaneous velocities are equal.
• 📈 Acceleration: In uniform motion, acceleration is zero ($a = 0$).
• 💡 Key Equations:
  • $\Delta x = v \cdot \Delta t$
  • $x_f = x_i + v \cdot \Delta t$
• 📝 Important Notes:
  • Pay attention to units! Ensure consistency (meters, seconds, etc.).
  • Velocity is a vector, meaning it has both magnitude (speed) and direction.
  • Understand how to interpret position vs. time graphs (straight line with constant slope).

🧪 Practice Quiz

1. A car travels at a constant velocity of 20 m/s east for 10 seconds. What is the displacement of the car?
   1. A) 5 m
   2. B) 100 m
   3. C) 200 m
   4. D) 300 m
2. An object moves with a constant velocity of 5 m/s. How long will it take to travel 25 meters?
   1. A) 2 seconds
   2. B) 3 seconds
   3. C) 5 seconds
   4. D) 10 seconds
3. A train travels 120 km in 2 hours at a constant speed. What is its speed in km/h?
   1. A) 30 km/h
   2. B) 60 km/h
   3. C) 120 km/h
   4. D) 240 km/h
4. A runner maintains a constant speed of 6 m/s. How far will they run in 30 seconds?
   1. A) 5 m
   2. B) 18 m
   3. C) 180 m
   4. D) 540 m
5. A bicycle travels at a constant speed of 15 m/s. How long does it take to travel 45 meters?
   1. A) 0.33 seconds
   2. B) 3 seconds
   3. C) 30 seconds
   4. D) 675 seconds
6. What is the acceleration of an object moving at a constant velocity?
   1. A) 9.8 m/s²
   2. B) Constant
   3. C) Increasing
   4. D) Zero
7. A car starts at position x = 5 m and travels at a constant velocity of 10 m/s for 5 seconds. What is its final position?
   1. A) 10 m
   2. B) 50 m
   3. C) 55 m
   4. D) 5 m