Rent a rideshare bike and ride it throughout the course at apace that elevates your heartbeat
somewhat, but without over-exertion. Time your ride and calculateyour average speed. Draw a
force diagram for the bicycle’s motion, and label it with estimatesof each force. Calculate the
power you used during your ride to maintain your average speed, inwatts and then in
horsepower. Calculate the (exercise) Calories you burned duringyour ride. (My time was 8.23 minutes for 1.3 miles)

Rent a rideshare scooter and ride it throughout the same courseat a safe speed. Try to go
somewhat faster than the bike, but most importantly stay safe. Timeyour ride and calculate your
average speed. Draw a force diagram and label it with estimates ofeach force. Calculate the
power used by the electric motor to maintain your average speed, inwatts and then in
horsepower. (My time was 1.2 miles for 11minutes and 10mph.)
In both calculations, include estimates for resistance from bothsurface friction and air. You will
need to research a plausible (e.g., order of magnitude) estimatefor (a) the coefficient of rolling
friction from the wheels (used in the same way as the coefficientof kinetic friction we discuss in
class problems), and (b) drag from air resistance. Which islarger?

MAke sure to calculate air resistance and friction resistancefor the bike and scooter. Draw force diagrams for the bike andscooter.