Home
Class 11
PHYSICS
The question given below consist of an ...

The question given below consist of an assertion and the reason . Use the following key to choose appropriate answer:
Assertion : At the highest point velocity of the projectile is zero
Reason : At the highest point of trajectory acceleration of the particle becomes zero for an instant .

A

If both assertion and reason are correct and reason is a correct explanation of the assertion

B

If both assertion and reason are correct but reason is not the correct explanation of assertion .

C

If assertion is correct but reason is incorrect .
(d) If assertion is incorrect but reason is correct .

D

If both assertion and reason are incorrect .

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the assertion and reason, we will analyze both statements step by step. ### Step 1: Analyze the Assertion The assertion states: "At the highest point, the velocity of the projectile is zero." - In projectile motion, when a projectile reaches its highest point, the vertical component of its velocity becomes zero. However, the horizontal component of the velocity remains constant throughout the motion (assuming no air resistance). - Therefore, the total velocity of the projectile at the highest point is not zero; it only has a horizontal component. **Conclusion for Assertion**: The assertion is **incorrect**. ### Step 2: Analyze the Reason The reason states: "At the highest point of the trajectory, the acceleration of the particle becomes zero for an instant." - In projectile motion, the only force acting on the projectile is gravity, which acts downwards. This means that the acceleration due to gravity is always present and is equal to approximately \(9.81 \, \text{m/s}^2\) downwards. - At the highest point, while the vertical component of the velocity is zero, the acceleration due to gravity is still acting on the projectile. Therefore, the acceleration does not become zero at any point during the motion. **Conclusion for Reason**: The reason is also **incorrect**. ### Final Conclusion Both the assertion and the reason are incorrect. Therefore, the correct answer is option D: Both assertion and reason are incorrect. ---
Promotional Banner

Topper's Solved these Questions

  • MOTION IN A PLANE

    MODERN PUBLICATION|Exercise COMPETITION FILE OBJECTIVE TYPE QUESTIONS (MATCHING TYPE QUESTIONS)|2 Videos

  • MOTION IN A PLANE

    MODERN PUBLICATION|Exercise COMPETITION FILE OBJECTIVE TYPE QUESTIONS (MATRIX MATCH TYPE QUESTIONS)|1 Videos

  • MOTION IN A PLANE

    MODERN PUBLICATION|Exercise COMPETITION FILE OBJECTIVE TYPE QUESTIONS (D. MULTIPLE CHOICE QUESTIONS)|9 Videos

  • MECHANICAL PROPERTIES OF FLUIDS

    MODERN PUBLICATION|Exercise Chapter Practise Test|16 Videos

  • MOTION IN A STRAIGHT LINE

    MODERN PUBLICATION|Exercise CHAPTER PRACTICE TEST|16 Videos

Similar Questions

Explore conceptually related problems

The question given below consist of an assertion and the reason . Use the following key to choose appropriate answer: Assertion : When path of one projectile is observed with respect to another projectile, then it is a straight line . Reason : Both the projectiles are moving with the same acceleration , hence acceleration of one with respect to the other is zero .

The question given below consist of an assertion and the reason . Use the following key to choose appropriate answer: Assertion : We cannot divided a vector quantity by another vector quantity. Reason : we can divide a vector quantity by a scalar quantity .

The question given below consist of an assertion and the reason . Use the following key to choose appropriate answer: Assertion : There is a case of ground -to - ground projectile . When projectile is fired at an its path where instantaneous velocity becomes perpendicular to its initial velocity . Reason : In case of ground -to- ground projectile projected at an angle theta , maximum possible deviation is 2 theta ,

The question given below consist of an assertion and the reason . Use the following key to choose appropriate answer: Assertion: In projectile motion , path followed is a parabola because acceleration due to gravity near the surface of the earth remains constant . Reason , When acceleration of the particle is constant , then only possible path is parabola .

The question given below consist of an assertion and the reason . Use the following key to choose appropriate answer: Assertion : A particle is projected with some speed at a certain angle with the horizontal at time t=0. During the motion , let vecv1 & vecv2 be the velocities of v body at time t_(1) and t_(2) respectively . In this case (vecv2-vecv1)/(t_(2)-t_(1)) remains constant for any interval of motion . Reason : At the highest point velocity of the projectile is zero .

The question given below consist of an assertion and the reason . Use the following key to choose appropriate answer: Assertion: Range of projectile motion is same when particle is projected at an angle theta with the horizontal or at an angle (90^(@) -theta) with the horizontal . Reason : Range of projectile motion depended only on the angle of projection.

The questions given below consist of Assertion (A) and Reason (R ) . Use the following key to select the correct answer. Assertion : In Zeise's salt, co-ordianation number of Pt is five. Reason : Ethene is a bidentate lignad .

The questions given below consist of Assertion (A) and Reason (R ) . Use the following key to select the correct answer. Assertion : The ligand N_3^(-) is named as nitrido. Reason : It is derived from NH_3 .

The questions given below consist of Assertion (A) and Reason (R ) . Use the following key to select the correct answer. Assertion : Oxidation state of Fe in Fe(CO)_5 is zero . ltbegt Reason : EAN of Fe in its complex is always 36.