-2- A force of 500N acts on a body with a mass of 5 kg. What is the acceleration with which you will move the body?

1. A 25kg boy is riding a merry-go-round with a radius of 5m. What is the centripetal force on the boy if his velocity is 6 m/s?

1. A   10 kg,    0.5 m  radius wheel rotates with an angular acceleration of  10 rad/s/s.  What is the torque       (  KNm )   developed at the rim of the wheel? 2. A  10 kg,  0.5 m radius wheel running at  1800 rpm   develops a torque of   50  KNm.  Find the power        ( KW )   transmitted by the wheel. 3. The total acceleration develop at the rim of the wheel  100  m/s/s.    What is the wheel centripetal acceleration (  m/s/s )   if the tangential acceleration is  80  m/s/s ? 4. A particle moves in such a way that   a  =  2 s  +  1   m/s/s ,  where t is in seconds.  If the particle has moved   9 m ,  what is the velocity   ( m/s )   at that point ?

(b) An electric motor lifts a mass of 500 kg from the ground to a height of 30 m in 1.5 minutes. Calculate the motor's output power during operation. The gravitational acceleration, g, is 9.81 m. s-².