Identify the point groups to which the following objects belong: (i) a sharpened cylindrical pencil, (ii) a box with a rectangular cross-section, (iii) a coffee mug with a handle, (iv) a three-bladed propeller (assume the sector-like blades are flat), (v) a three-bladed propeller (assume the blades are twisted out of the plane, all by the same amount).

Answer: it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.explanation:   we have equation of motion ,where s is the displacement, a is the acceleration, u is the initial velocity and t is the time taken.average velocity = displacement/ time taken.average velocity = 10.69 miles/hr = 10.69*1.6*1000/(60*60) = 4.75 m/s4.75 = s/ts = 4. 1we also have acceleration = 2.18 m/s², initial velocity = 0 m/sso it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.