alleryA body moves 30 m east in 5 s and then 10 m west in 5 s. What is its average velocity over the entire 10 s interval?
A4 m/s east
B2 m/s east
C4 m/s west
D0 m/s
Answer & Solution
Correct answer: B. 2 m/s east
Net displacement $=30-10=20$ m east. Total time $=10$ s.
Therefore average velocity $=\frac{20}{10}=2$ m/s east.
A common mistake is to divide total distance 40 m by time, which would give average speed, not average velocity.
Keep practising Unit 1A: Kinematics: 1D Motion, Position & Velocity
Browse all Unit 1A: Kinematics: 1D Motion, Position & Velocity questions for AP Physics 1, or explore more Physics topics.
Related questions
The audible range of frequencies for a normal human ear is approximately:The loudness of a sound is related to its:The pitch of a sound is determined primarily by its:The maximum displacement of particles from their mean position is called the:If the frequency of a wave is f and its wavelength is λ, its speed v is given by:The time taken for one complete oscillation is the:The SI unit of frequency is the:The number of complete oscillations per second is called the: