week 1 Flashcards
1
Q
define work and state the formula
A
work: energy transferred by a force
Work = Force x distance
2
Q
what is work measured in (4 things)
A
- joules (J)
- kilojoules (kJ) - 1000 J = 1 kJ
- calories (cal)
- Calories (kcal) - 1000 cal = 1 kcal
3
Q
pedaling turns the ___, ___ is determined by friction against the flywheel, ___ against the flywheel is determined by tension in the brake belt, ___ in the brake belt is increased by adding ___ to the basket
A
- flywheel
- resistance
- friction
- tension
- weight
4
Q
what does changing the pedal speed change
A
the RATE at which work is done
5
Q
define power and what is its formula
A
rate at which work is done
power = work/time
