Question

Straight Push-Ups is an example of-

• A. Law of Inertia
• B. First Class Lever
• C. Second Class Lever
• D. Third Class Lever

Hint:

Fulcrum at the toes, load in the middle, effort at the arms.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
A lever has three parts: fulcrum (pivot), load and effort. The class of the lever depends on which part is in the middle.

Step 2: Key Approach:
First class: fulcrum in the middle. Second class: load in the middle. Third class: effort in the middle.

Step 3: Apply to push-ups:
In a straight push-up the toes stay on the ground and act as the fulcrum. The body weight (load) acts at the centre of the body. The effort comes from the arms at the far end. The load lies between the fulcrum and the effort, so this is a second class lever.

Step 4: Check option (1):
Law of Inertia is a law of motion, not a type of lever. So (1) is wrong.

Step 5: Check option (2):
In a first class lever, the fulcrum is in the middle, like a seesaw. This is not the push-up. So (2) is wrong.

Step 6: Check option (4):
In a third class lever the effort lies in the middle, like a biceps curl. So (4) is wrong.

Final Answer:
Straight push-ups are an example of a second class lever. This is option (3). \[ \boxed{\text{Second Class Lever}} \]