Question

8. A lever of length 9 cm has its load arm 5 cm long
and the effort arm is 9 cm long. (a) To which class
does it belong ? (b) Draw a diagram of the lever showing
the position of the fulcrum F and directions of both
the load L and effort E. (c) What is the mechanical
advantage and velocity ratio if the efficiency is 100%?
(d) What will be the mechanical advantage and velocity
ratio if the efficiency becomes 50% ?
plzz tell .....​

Answer 1

Answer:

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Answer 2

Answer:

Hey buddy here's ur answer !!

Explanation:

(a) It is second class lever

(b) Diagram is above

Load and effort are in opposite direction

M.A=

effortrequired

Loadlifted

=

E

L

=

5

9

=1.8

V.R=

distancemovedbyload

distancemovedbyeffort

=

η

M.A

(c) If efficiency is η=100%=1

η=

V.R

M.A

V.R=

1

1.8

=1.8

(d) If efficiency is η=50%=0.5

η=

V.R

M.A

V.R=

0.5

1.8

=3.6

Hope it helps and plzz mark as the brainliest !!