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For a freely falling body...

For a freely falling body

A

True weight = Apparent weight

B

True weight lt Apparent weight

C

Apparent weight is zero

D

Apparent weight gt Normal reaction

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding a freely falling body, we need to analyze the forces acting on the body and understand the concept of apparent weight. ### Step-by-Step Solution: 1. **Understanding the Forces**: - When an object of mass \( m \) is in a gravitational field, it experiences a gravitational force (true weight) given by \( W = mg \), where \( g \) is the acceleration due to gravity. 2. **Normal Force in a Non-Free Falling Situation**: - In a stationary situation or when the object is not falling, the normal force \( N \) acting on the object balances the gravitational force. Thus, we have: \[ N = mg \] - Here, the object feels its full weight. 3. **Free Fall Condition**: - When the object is in free fall, it accelerates downwards at the same rate as gravity, which means its acceleration \( a = g \). 4. **Applying Newton's Second Law**: - In a free-falling scenario, we can apply Newton's second law. The net force acting on the object is: \[ F_{\text{net}} = mg - N \] - Since the object is in free fall, the net force is also equal to \( ma \). Therefore, we can write: \[ mg - N = ma \] 5. **Substituting for Free Fall**: - In free fall, the acceleration \( a \) is equal to \( g \). Thus, we substitute \( a \) with \( g \): \[ mg - N = mg \] 6. **Solving for Normal Force**: - Rearranging the equation gives: \[ N = mg - mg = 0 \] - This indicates that the normal force (apparent weight) acting on the object is zero during free fall. 7. **Conclusion**: - Therefore, the apparent weight of the object in free fall is zero. ### Final Answer: The correct option is that the apparent weight is zero. ---
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AAKASH INSTITUTE ENGLISH-GRAVITATION -ASSIGNMENT SECTION -A (Objective Type Questions (one option is correct))
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