Question
If she doubles her speed to $10 \mathrm{m} / \mathrm{s},$ how much energy does she use in cycling $1 \mathrm{km} ?$A. $20 \mathrm{kJ}$B. $40 \mathrm{kJ}$C. $200 \mathrm{kJ}$D. $400 \mathrm{kJ}$
Step 1
The question asks how much energy a cyclist uses when she doubles her speed from an unspecified initial speed to 10 m/s, and then cycles a distance of 1 km. Show more…
Show all steps
Your feedback will help us improve your experience
Surjit Tewari and 60 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
10. What is the kinetic energy of a 62kg cyclist if she is moving on her bicycle at 8.2 m/s?
If $10 \%$ of a $50-\mathrm{kg}$ rock climber's total energy expenditure goes into the gravitational energy change when climbing a $100-\mathrm{m}$ vertical slope, what is the climber's average metabolic rate during the climb if it takes her 10 min to complete the climb? (a) $8 \mathrm{W}$ (b) $80 \mathrm{W}$ (c) $500 \mathrm{W}$ (d) $700 \mathrm{w}$ (e) $800 \mathrm{W}$
If 10% of a 50-kg rock climber’s total energy expenditure goes into the gravitational energy change when climbing a 100-m vertical slope, what is the climber’s average metabolic rate during the climb if it takes her 10 min to complete the climb? (a) 8 W (b) 80 W (c) 500 W (d) 700 W (e) 800 W
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD