Home
Class 12
PHYSICS
STATEMENT -1 : You are sleeping . Now ...

STATEMENT -1 : You are sleeping . Now , earth suddenly stops attracting objects near its surface . You will start flying up . (Neglect earth's effect of rotation).
and
STATEMENT -2 : Normal force by surface of bed on you will be zero, if your weight becomes zero while you are sleeping .

A

Statement -1 True, Statement -2 is True , Statement - 2 is a correct explanation for Statement -1

B

Statement -1 is True , Statement -2 is True , Statement -2 is NOT a correct explanation for statement -1

C

Statement -1 is true, Statement -2 is False

D

Statement - 1 is False , Statement - 2 is True

Text Solution

AI Generated Solution

The correct Answer is:
To solve the problem, we need to analyze both statements provided in the question. ### Step 1: Analyze Statement 1 **Statement 1:** "You are sleeping. Now, Earth suddenly stops attracting objects near its surface. You will start flying up." - When you are sleeping on a bed, the gravitational force (weight) acting on you is given by \( mg \), where \( m \) is your mass and \( g \) is the acceleration due to gravity. - If Earth suddenly stops attracting objects, the gravitational force \( mg \) becomes zero because \( g = 0 \). - Since there is no gravitational force acting on you, there are no forces acting on you at that moment. - According to Newton's first law of motion, an object at rest will remain at rest unless acted upon by a net external force. - Therefore, you will not start flying up; instead, you will remain in your initial position. **Conclusion for Statement 1:** This statement is **false**. ### Step 2: Analyze Statement 2 **Statement 2:** "Normal force by the surface of the bed on you will be zero if your weight becomes zero while you are sleeping." - The normal force \( N \) is the force exerted by a surface to support the weight of an object resting on it. It acts perpendicular to the surface. - The normal force can be expressed as \( N = mg \). - If your weight becomes zero (which happens when \( g = 0 \)), then substituting into the equation gives \( N = 0 \). - This means that if your weight is zero, the normal force exerted by the bed on you will also be zero. **Conclusion for Statement 2:** This statement is **true**. ### Final Conclusion - **Statement 1 is false.** - **Statement 2 is true.** Thus, the correct option is: **Option D:** Statement 1 is false and Statement 2 is true.
Promotional Banner

Topper's Solved these Questions

  • LAWS OF MOTION

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT ( SECTION -F ) Matrix - Match Type Questions|4 Videos

  • LAWS OF MOTION

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT ( SECTION -G ) Integer Answer Type Questions|7 Videos

  • LAWS OF MOTION

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT ( SECTION -D) Linked Comprehension Type Question (Comprehension -IV) (Choose the correct answer :)|3 Videos

  • KINETIC THEORY

    AAKASH INSTITUTE ENGLISH|Exercise EXERCISE (ASSIGNMENT) SECTION - D Assertion - Reason Type Questions|10 Videos

  • MAGNETISM AND MATTER

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT (SECTION D)|26 Videos

Similar Questions

Explore conceptually related problems

Neglect the effect of rotation of the earth. Suppose the earth suddenly stops attracting objects placed near its surface. A paerson standing on the surface of the earth will

STATEMENT -1 : A body kept at rest upon earth's surface near New Delhi, if allowed to move freely inside the Earth's surfface will reach the earth centre directly. and STATEMENT -2 : All bodies upon earth's surface experience centrifugal force.

STATEMENT -1 : An orbiting satellite orbiting round the earth, misses the path and starts moving towards the earth, but before reaching the Earth's surface it is burnt in the dense atmosphere of earth. and STATEMENT -2 : As the satellite move towards earth, its speed goes on increasing. It is burnt due to high heat production because of enormous large speed in dense atmosphere.

STATEMENT-1: When a body is connected to earth, all its charge flows to earth and it becomes electrically neutral. Because STATEMENT-2: Electric potential of earth is zero so the electric potential of body should also become zero.

STATEMENT-1: For practical purposes, the earth is used as a reference at zero potencial in electrical circuits. and STATEMENT-2: The electrical potential of a sphere of radius R with charge Q uniformly distributed on the surface is given by (Q)/(4piepsilon_0R) .

Assertion : If rotation of earth about its own axis is suddenly stops then acceleration due to gravity will increase at all places on the earth. Reason : At height h from the surface of earth acceleration due to gravity is g_(h)=g(1- (2h)/R_(e)) .

These questions consists of two statements each printed as Assertion and Reason. While answering these question you are required to choose any one of the following five reponses (a) If both Assertion and Reason arecorrect and Reason is the correct explanation of Asserrtion. (b) If both Assertion and Reason are correct but Reason is not the correct explanation of Assertion. (c ) If Assertion is true but Reason is false. (d) If Assertion is false but Reason is true. Assertion A block of mass m starts moving on a rough horizontal surface with a velocity v. It stops due to friction between the block and the surface after moving through a certain distance. The surface is now tilted to an angle of 30^(@) with the horizontal and the same block is made to go up on the surface with the same initial velocity v. The decrease in the mechanical energy in the second situation is smaller than that in the first situation. Reason The coefficient of friction between the block and the surface decreases with the increase in the anglle of inclination.