m2 SOME MORE INCLINED PLANES

Which of the following is always true of simple machines?

• They increase the work inputted

• They decrease the work inputted

• They always increase the distance over which the effort is applied

• The work put in and the work out are the same.

What is the definition of the Ideal Mechanical Advantage?

• A number that tells you how difficult it is to control a machine.

• A number that tells you how many moving parts a machine has

• A number that tells you how much more difficult a machine will make your work

• A number that tells you how much easier a machine will make your work

An inclined plane decreases effort force by increasing what?

• time

• distance

• output force

• input force

Which of the following formulae give the mechanical advantage of an inclined plane?

• D/C

• A/B

• C

• D X A

X represents the weight of the load. How would you calculate the weight using the other variables?

• 12 / (3/9)

• (3/9) x 12

• (9/3) x 12

• 12 / (9/3)

What is the ideal mechanical advantage (IMA) of this inclined plane? (enter value only)

(a)  

What is the applied force (effort) in Newtons required to push the box up the ramp? (enter value only ie no units)

(a)  

How much work was done to get the box up to the top of the ramp?

• 100 x 5 Joules

• 100 x 10 Joules

• (10/5) x 100 Joules

• (100/(10/5)) x 10 Joules

How much does this object weigh (X)? (hint GPE = weight x height)

• 360 J

• 120 J

• 360 N

• 120 N

How long is this ramp?

• 4 m

• 8 m

• 12 m

• 20 m