1. A bicyclist starts at 2.5 m/s and accelerates along a straight path to a speed of 12.5 m/s in a time of 4.5 seconds. What is the bicyclist's acceleration to the nearest tenth of a m/s??

b. lifting dumbbell weight at 20-degree angle from the body after a 45-degree angle

the tires are rotating at 0.434 rpmlinear speed=45 m/sdiameter=0.550 mradius=0.275 mnow v= rωω= v/rω=45/0.275ω=163.6 rad/sω=163.6 rad/s (1rev/2π rad) (60s/1m)ω=1563 rpm