Question

answer all if you are not going to answer all of them do not answer pls

(5 pts) 6. A motor runs at 1125 rpm. What is the angular speed of the motor?

(5 pts) 7. What is its angular speed of a gear that rotate 6 complete revolutions in 30 seconds.

15 pts) 8. A powered circular saw blade is spinning at 2213 rpm.

a) What is its angular velocity?

b) Through how many radians will it spin in 3.1 seconds?

c). Using the information from question 9, how fast are the blade tips moving if the blade has a 32 cm diameter?(

20 pts) 9. A 2.8 meter rod is balanced directly on top of a wedge that is located at the half way point of the rod (think see saw).

a) draw this scenario

b) now draw a 2.1 kg mass 0.4m from the fulcrum on the right-hand side of the rod

c) if you have a second mass of 1.7 kg, where do you place it to balance the rod? Calculate this and draw the location (correct side) of the rod.

(20 pts) 10. Draw the rod from problem 9 again (centered on the fulcrum). Add a 200 g mass to the right side at 0.4 m. Then add a 300 g mass to the left side at 0.7 m from the fulcrum.

The rod will begin to rotate due to the torque, so what mass do you place at .85 from the fulcrum on the right side to balance the system?

Answer 1