A child travelling in a train throws a ball outside with a speed v. According to child who is standing on the ground, the speed of ball is. (a) same as v. (b) greater than v. (c) less than v. (d) none of these

Question

A child travelling in a train throws a ball outside  with a speed v. According to child who is standing on the ground,  the speed of ball is.       (a) same as v.         (b)  greater than v.       (c) less than v.         (d) none of these

Answer

a) because as an object is thrown from a moving body, it takes the velocity of that body initially.

Answer

In the direction of train ball will have train velocity with respect to ground and it has it own velocity 'v' so resultant of those 2 velocity give the actual velocity of ball with respect to the ground, so it can be greater (if through in same direction of train) or small than v (if through in opposite direction)

Answer

Explanation:

Introduction:
When a child throws a ball outside a moving train, the ball's motion will be influenced by both the child's throw and the train's velocity. To understand how the child perceives the speed of the ball from the ground, we need to consider the concept of relative velocity.

Relative Velocity:
Relative velocity refers to the motion of an object in relation to another object. In this case, the child on the ground perceives the ball's motion relative to themselves, taking into account the motion of the train.

Effect of Train's Motion:
The child throwing the ball is also moving with the train. Therefore, the initial velocity of the ball includes the velocity of the train. When the child throws the ball, both the initial velocity imparted by the child and the velocity of the train are added together.

Same Speed as Thrown:
From the child's perspective on the ground, the ball's speed will be the same as the speed at which the child threw it. This is because the child's perception of the ball's motion does not take into account the velocity of the train. Therefore, the answer is (a) the speed of the ball is the same as v, the speed at which the child threw it.

Conclusion:
The child perceives the speed of the ball as the same speed at which they threw it. The velocity of the train does not affect the child's perception of the ball's motion.

Answer

a

Similar Class 11 Doubts

Choose the correct alternative (s)

Equation of a stationary and a travelling waves are as follows y1 = a sin kx cos t and y2 = a sin ( t kx ) . The phase difference between two points in the standing wave ( y1 ) and is 2 in travelling wave (y2) , then ratio

Top Courses for Class 11View all

Chemistry Class 11

CUET Mock Test Series

English Class 11

Chemistry Practice Tests: CUET Preparation

CUET Mock Test: Humanities Subjects 2025

Top Courses for Class 11

Top Courses for Class 11

Suggested Free Tests

Related Content

Schools

Competitive Examinations

Quick Access Links

Technical Exams