1.Choose a simple machine to could be used to do the following: A) lifting a car to change a tire; B) removing a lid from a can of paint; C) undoing a tight bolt; D) splitting a log for firewood; E) moving a car from the lower level of a parking garage to a higher level; F) raising a bucket of tools from the sidewalk to the second floor.
2.Draw a labeled diagram of each class of lever that requires the LEAST amount of input force.
3.A boy and a girl sat at opposite ends on an unusual see-saw in a playground. Suppose the total length of the see-saw is 3 m and assuming that the anchor point is 1/5 distance away from the girl. State the IMA in two ways. In what scenarios is it “easier” to lift the other up?
4.To remove a screw, Jess uses a screwdriver. What simple machine is this? Suppose that the shaft of the screwdriver has a diameter of 0.8 cm and the handle has a radius of 1.6 cm, what is the IMA?
5.Determine the IMA of a bicycle if the chain provides an input force to a back sprocket that has a radius of 8 cm and the back wheel of the bicycle has a radius of 32 cm.
6.If the IMA of a first-class lever is 2 and the distance from the fulcrum to the load is 60 cm, how far away from the fulcrum is the input force? Draw a labeled diagram along with your calculation.
7.If the IMA of a ramp is 12 and the length of the ramp is 4 m, what is the height of the ramp? Draw a labeled diagram along with your calculation.
8.A 12 kg crate is pushed up a 8 m ramp to reach a height of 4 m with a force of 100 N. What is the efficiency of the ramp?
9. You have to lift a mass to a higher location so that the mass gains 800 J of gravitational potential energy. You may use one of the three different mechanisms provided. Calculate the efficiency of each mechanism. Which one will you use? (A) You use an electric motor that requires 850 J of energy to lift the mass. (B) You pull the role of a pulley, which is attached to the mass, a distance of 6 m with a force of 150 N. (C) You push the mass 10 m up a ramp with a force of 140 N.
