Tag: terms related to machines

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Questions Related to terms related to machines

Multiple choice physics lever common machines terms related to machines introduction to simple machines

It is difficult to climb the steps having greater inclination. Why?

  1. Less erect steps require less energy

  2. Greater inclination requires less effort because of the high mechanical advantage

  3. Greater iriclination requires more effort because of the low mechanical advantage

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

As steps become more inclined, the vertical height gained per step increases, requiring more work against gravity. This reduces the mechanical advantage because a greater portion of the applied force goes into lifting vertically rather than moving forward.

Multiple choice physics lever common machines terms related to machines introduction to simple machines

For a _________, the mechanical advantage is always less than one.

  1. first order lever

  2. second order lever

  3. third order lever

  4. both A and C
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In a third-class lever, the effort is applied between the fulcrum and the load. Since the effort arm is always shorter than the load arm, the mechanical advantage is always less than 1.

Multiple choice physics lever common machines terms related to machines introduction to simple machines

Mechanical advantage of a second order lever is :

  1. always less than one

  2. less than or equal to one

  3. always greater than one

  4. greater than or equal to one
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In a second-class lever, the load is between the fulcrum and the effort. This means the effort arm is always longer than the load arm, resulting in a mechanical advantage always greater than 1.

Multiple choice physics lever common machines terms related to machines introduction to simple machines

When the same amount of force is applied :

  1. A nail travels more distance than a screw into the wood board

  2. Screw travels more distance than the nail

  3. Both pierce the wood board to equal distance

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A screw is an inclined plane wrapped around a cylinder. When force is applied, the screw must rotate multiple times to penetrate the wood, resulting in a longer travel distance compared to a nail, which is driven straight in.

Multiple choice physics lever common machines terms related to machines introduction to simple machines

A boy can exert a maximum force of $10$kg, i.e he cannot lift vertically a load of mass more than $10$kg. Now if he wants to raise a load of mass $20$kg on to a high eall, he can do it with the help of an inclined place making an angle $\theta$ with the horizontal. Find $\theta$.

  1. $60^o$

  2. $80^o$

  3. $30^o$

  4. $20^o$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

$sin \theta=\dfrac{1}{M.A}=\dfrac{Effort}{Load}=\dfrac{10}{20}=\dfrac{1}{2}$
Thus, by placing a wooden plank at $\theta=30^o$ an angle equal to $30^o$ with the horizontal group can push the load of mass $20$Kg at any height by exerting a force(or effort) of $10$kg.

Multiple choice physics lever common machines terms related to machines introduction to simple machines

The velocity ratio of a machine is 1 if 

  1. The displacement of load is equal to the displacement of effort

  2. The displacement of load > equal to the displacement of effort

  3. The displacement of load < equal to the displacement of effort

  4. None of the above 
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The velocity ratio of a machine is equal to the displacement of effort such a machine changes the direction of effort.

Multiple choice physics lever common machines terms related to machines introduction to simple machines

As the closeness of threading increases in a screw :

  1. mechanical advantage decreases

  2. effort required will be less

  3. inclination increases

  4. all the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Increasing the closeness of threading (decreasing the pitch) increases the mechanical advantage of the screw. A higher mechanical advantage means that less effort is required to drive the screw into the material.