Table of Contents
Can velocity ratio be greater than mechanical advantage?
A. always less than the velocity ratio for an actual machine.
Is velocity ratio the same as mechanical advantage?
Mechanical advantage is defined as the ratio of resistance overcomes to the effort applied. Velocity ratio of simple machine is the ratio of distance travelled by effort to the distance travelled by load in the machine.
How do the speed ratio and the mechanical advantage compare?
The mechanical advantage is the force ratio of a machine. The more a machine multiplies the force, the greater is the mechanical advantage of the machine. Speed measures the distance an object travels in a given amount of time. The measure of how a machine affects speed is called the speed ratio.
When the velocity ratio of a simple machine is greater than one the machine is speed multiplier?
If the velocity ratio of a machine is greater than one, it implies that the machine is a force multiplier and causes loss of speed.
Which one has less velocity ratio?
The mechanical advantage(M.A) of a real machine is always less than its velocity ratio(V.R) because mechanical advantage decreases due to the friction and weight of moving parts of the machine whereas the velocity ratio remains constant.
Why can a machine not be 100% efficient?
A machine cannot be 100 percent efficient because output of a machine is always less than input. A certain amount of work done on a machine is lost to overcome friction and to lift some moving parts of the machine.
Why velocity ratio has no unit?
Answer: Velocity ratio of simple machine is the ratio of distance travelled by the effort to the distance travelled by theload in the machine. As velocity ratio or ideal mechanical advantage is a simple ratio of two distances, it also does not have the unit. The friction is not involved in it.
What is the formula of velocity ratio?
= dE / dL = ratio of the displacement of the effort to the displacement of the load. When the Velocity Ratio (VR) value of a machine is less than 1 then we can say that machine provides a speed gain.
What does a mechanical advantage less than 1 mean?
A machine with a mechanical advantage of less than 1 does not multiply the force but increases the distance and speed.
Why is a machine not 100 percent efficient?
Why is velocity ratio not affected by friction?
Explanation:because it is the ratio of distance, which is not affected by friction.