A car moves for half of its time at 80 km/h and for rest half of time at 40 km/h. Total distance covered is 60 km. What is the average speed of the car (a) 60 km / h (b) 80 km / h (c) 120 km / h (d) 180 km / h
Added by George K.
Step 1
Let's assume the car travels at 80 km/h for t hours. Then it travels at 40 km/h for t hours as well. The distance traveled at 80 km/h is 80t km. The distance traveled at 40 km/h is 40t km. Since the total distance covered is 60 km, we can write the Show more…
Show all steps
Your feedback will help us improve your experience
Kamlesh Goyal and 71 other Physics 101 Mechanics educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
A car moves for half of its time at 80 km/h and for rest half of time at 40 km/h. Total distance covered is 60 km. What is the average speed of the car
Vivek K.
A car moves at $80 \mathrm{~km} / \mathrm{hr}$ in the first half of total time of motion and at $40 \mathrm{~km} / \mathrm{h}^{-1}$ in the later half. Its average speed is: (a) $60 \mathrm{~km} / \mathrm{hr}$ (b) $30 \mathrm{~km} / \mathrm{hr}$ (c) $120 \mathrm{~km} / \mathrm{hr}$ (d) none of these
An automobile travels on a straight road for 40 km at 30 km/h. It then continues in the same direction for another 40 km at 60 km/h. (a) What is the average velocity of the car during the full 80 km trip? (Assume that it moves in the positive x direction.) (b) What is the average speed?
Prabhu R.
Recommended Textbooks
University Physics with Modern Physics
Physics: Principles with Applications
Fundamentals of Physics
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD