And efficiency? Effort=20N
efficiency.
Study the given figure and calculate the MA, VR and
In a wheel and axle, the radius of the wheel is 60 cm and that
of axle is 6 cm. If an effort of 30 N is needed to lift a load of
210 N, what is the efficiency of the machine? (Ans: 7, 10,70%]
[Ans: MA = 1.5, VR = 2, n = 75%]
le the radius of the wheel is 40 cm and that
-30N

please sent the question in picture .

It is easy to Understand

answer: the common difference is -0.10

answer: the price of one pound cabbage = $ 0.8

the point (10,8) represents that the cost of 10 pounds cabbage is $ 8

step-by-step explanation:

since, here is a proportional relation between the number of pounds of cabbage (x) and the price in dollars (y).

therefore, we can write,

⇒ y = k x

where k is the constant of proportionality.

now, point (5,4) is in the line.

thus, it will satisfies the above equation of line.

⇒ 4 = 5 k

⇒ k = 0.8

thus, the equation of the line is,

y = 0.8 x

a) for x = 1,

y = 0.8

therefore, the cost of one pound of cabbage is 0.8 dollars.

b) in the below graph (10,8) represents that the cost of 10 pounds of cabbage is 8 dollars.