The diagram shows a velocity-time graph for an object falling through a fluid, eg air, water, oil. Between A and B The object accelerates at first because of the force of gravity.

When the jumper starts - the acceleration is essentially -9.8 m/s 2. After the jumper goes faster than terminal velocity, the air resistance force is greater than the weight so that the ...

At t 2, the angular velocity is zero, with a non-zero (positive) angular acceleration. At that time, the direction of rotation for BC is changing from CW to CCW. In summary, you should never assume ...