1.5

Question 1

what are the 4 different types of motion

Answer 1

linear,ocillating,rotary and reciprocating

Question 2

what is linear motion

Answer 2

only moves in a straight line ( one direction)

Question 3

what is rotary motion

Answer 3

Moves around in a circular motion

Question 4

what is reciprocating motion

Answer 4

linear motion backwards and forwards in a straight in a straight line

Question 5

what is ocillating motion

Answer 5

Movement backwards and forwards in a circular arc

Question 6

what is meant by the term effort

Answer 6

how much force is put in to move the object

Question 7

what is meant by the term load

Answer 7

the object being moved

Question 8

what is meant by the term fulcrum

Answer 8

the pivot point

Question 9

what is a first order lever

Answer 9

the fulcrum is between the effort and the load

Question 10

what is a second order lever

Answer 10

the load and effort on the same side as the fulcrum

Question 11

what is a thrid order lever

Answer 11

the load and effort on the same side as the fulcrum but are spread apart

Question 12

what do linkages do

Answer 12

transfer force and change the direction of motion

Question 13

what happens in a bell crank linkage

Answer 13

the direction of motion is turned through 90 degrees

Question 14

when is a push pull linkage (parallel motion linkage) used

Answer 14

when the direction of motion and magnitude of the forces are the same but are used when the force cannot be transfered directly in a straightline

Question 15

what are the 3 parts of a rotary system cam mechanism

Answer 15

cam slide and follower

Question 16

describe how a cam mechanism works

Answer 16

when the cam rotates, the follower moves up and down in a reciprocating motion. The pattern the follower moves up and down in is governed by the shape of the cam. It can do 3 things: go up and down or stay still

Question 17

what a grear train transmitt

Answer 17

rotary motion and torque

Question 18

how do you work out velocity ratio

Answer 18

number of teeth on the driven gear/number of teeth on the driver gear

Question 19

what is friction

Answer 19

the resistance of motion when object rubs againts another

Question 20

what is the co-efficient of friction

Answer 20

the amount of frcition an object has

Question 21

what type of mechsnism can turn rotary motion into linear or vice versa

Answer 21

rack and pinion mechanism or crank and slider mechanism

Question 22

what turns rotary to rotary motion
but what does this achieve

Answer 22

chain and sprocket mechanism
increases torque

Question 23

what does a pulley system do
but what does this achieve

Answer 23

transfers rotary motion to rotary motion
changes the speed of rotation