The radius of the wheel is 40 cm and the radius of the axle is 0.1 min a wheel and axle. If a load of 1200 N is overcome up to 4m by applying an effort of 400 N
calculate efficiency of wheel and axle

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value

The bar of prob. 5/82 is repeated here. the ends of the 0.4-m bar remain in contact with their re- spective support surfaces. end b has a velocity of 0.5 m/s and an acceleration of 0.3 m/s2 in the di- rections shown. determine the angular accelera- tion of the bar and the acceleration of end a.

If state law mandates that elevators cannot accelerate more than 2.40 m/s2 or travel faster than 14.8 m/s , what is the minimum time in which an elevator can travel the 373 m from the ground floor to the observatory floor? ?