Question

A machine having M.A> 1 act as a
a)As a load
b) As a speed multiplier
c) A force multiplier
d) none of these
​

Answer 1

Mechanical advantage (MA) = Effort arm / Load arm

a) A force multiplier

Multiply force by a constant factor.

But divide the distance by the same factor.

When Effort arm > Load arm, MA > 1 and such machine acts as a force multiplier.

b) A speed multiplier

Multiply speed by a constant factor.

Also acts as a force divider.

When Effort arm < Load arm, MA < 1 and such machine acts as a speed multiplier.

No, a machine cannot act as a force multiplier as well as a speed multiplier at the same time.

We can either overcome a large resistive force or can obtain gain in speed.

Answer 2

Answer:

A machine having M.A. > 1 act as a force multipliers.

Explanation:

Mechanical Advantages:

Mechanical advantages is defined as the ratio of output force by input force. If the effort arm is longer than the load arm then advantages is greater than 1 and if the effort arm is less than the load arm then the mechanical advantages is less than 1.

M.A. = $\frac{F_{o} }{F_{i} }$

A machine having M.A. greater than 1 acts as a force multiplier because the effort arm is longer than the load arm.