Distance, Displacement, Speed, Velocity, and Acceleration Puzzles
1. What is the difference between distance and displacement?
Hint: One is a scalar, the other is a vector.Distance is the total path length, while displacement is the shortest straight-line distance between two points.
2. Can displacement be greater than distance?
Hint: Displacement is the shortest path.No, displacement is always less than or equal to distance.
3. A person walks 4m east and then 3m north. What is the displacement?
Hint: Use the Pythagorean theorem.Displacement = √(4² + 3²) = 5m.
4. What is the SI unit of speed and velocity?
Hint: Think about distance and time.Both have the SI unit of m/s.
5. A car travels 100m in 5s. What is its speed?
Hint: Speed = Distance / Time.Speed = 100m / 5s = 20 m/s.
6. What is the key difference between speed and velocity?
Hint: One has direction, the other does not.Speed is a scalar quantity, while velocity is a vector quantity.
7. A car starts from rest and reaches 30 m/s in 10 seconds. What is its acceleration?
Hint: Use the formula a = (v - u) / t.Acceleration = (30 - 0) / 10 = 3 m/s².
8. A car moves with a constant velocity of 15 m/s. What is its acceleration?
Hint: Does velocity change?Acceleration = 0, since velocity is constant.
9. How can velocity change if speed remains constant?
Hint: Think about direction.If direction changes, velocity changes (e.g., circular motion).
10. If an object has uniform acceleration, how does its velocity-time graph look?
Hint: Acceleration means increasing velocity.A straight line with a positive slope.
