Torque WS I

You must complete all questions on your own paper. NO WORK NO CREDIT NO KIDDING

  1. What is Force?
  2. What is torque?
  3. What are two ways that torquecan be increased?
  4. Daisy tightens a bolt in her car engine by exerting 15 N of force on her wrench at a distance of 0.45 m from the fulcrum. How much torque must Daisy produce to turn the bolt?
  5. Zach produces 0.12Nm of torque when he turns on a water faucet (radius of 6cm) to fill bottles for the centripetal cup challenge. How much force did he have to apply?
  6. Emily and Hannah are working in the barn. Emily (60kg) needs to rest so she sits on the very end of a 3m plank carefully balanced on a saw horse. How much torque must Hannah apply at the other end to keep Emily from falling to the ground?
  1. Alex and Noble are seesawing on the school playground and decide to see if they can move to the correct location to make the seesaw balance. Alex weighs 400 N and he sits 2.0 meters from the fulcrum of the seesaw. How far from the fulcrum should Noble sit to balance the seesaw? Noble weighs 450N.

For problems 8 and 9, masses are being hung on a METER stick (100 cm) with the fulcrum at the 50 cm

mark.

  1. If a 300g mass is placed at the 0 cm mark (50 cm from the fulcrum), at what cm mark should a 500g mass be placed so that the system is balanced?
  2. If a 300g mass is placed at the 30 cm mark (20 cm from the fulcrum), at what mark should a 500g mass be placed so that the system is balanced?
  1. Refer to the diagram below. A ruler has a pivot point at the 40 cm mark. If a 70g mass is placed at the 25 cm mark,what would be the mass of a second object if it balanced the system when placed at the 60 cm mark?