The gear motor can develop to 1/2 hp when it turns at 300 rev/min. if the shaft has a diameter of 1/2 in. determine the maximum shear stress in the shaft

145.902 psi

Explanation: Given power = 0.5 hp= 225 ft-lb/sec, N= 300 rpm shaft

dia= 0.5 inch

We know that power transmitted by circular shaft is

now putting the values to find torque

⇒

⇒T=7.16 lb-ft

now to calculate shear stress

⇒

⇒=145.902 psi

hence maximum shear stress in the shaft is 145.902 psi

the word that best describes martin luther king jr.'s tone in the video is dignified

martin luther king, jr. was a social activist and baptist minister who played a key role in the american civil rights movement from the mid-1950s until his assassination in 1968. the video shows his manner and attitude having or showing a composed or serious manner that is worthy of respect so dignified is the correct answer

where are the vectors ?