A lever has efficiency 60% and Mechanical advantage 3 then,​

Here,

Now,

(1) solñ..

MA = L/E

or, 3 = 1000/E

or, 3E = 1000

or, E = 1000/3

.°. E = 333.33 N

(2)solñ...

,

efficiency = MA/VR *100

or, 60 = 3/VR *100

or, VR = 3/60 *100

.°. VR = 5

(3)solñ..

output work = L * h

=1000 * 20

=20,000

=2*10⁴J

>I hope it will helpful for you

total distance travelled = 60 miles

total time taken =1.5 hours

average speed = total distance / total time

60 / 1.5

= 40

therefore, average speed = 40 m/h

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the moon affects the earth gravitation ally, causing certain motions of that body and also producing tides in its ocean and atmosphere. the tidal wave in our atmosphere is, however, far too minute to be an effective cause in any known meteorological phenomenon.

explanation: