Assertion : A body can have acceleration even | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) When a body is thrown vertically upwards,at the highest point,its velocity becomes $0 \ m/s$.However,the gravitational force continues to act on i

Vedclass · Accepted Answer

If both $Assertion$ and $Reason$ are correct and the $Reason$ is a correct explanation of the $Assertion$.

Vedclass · Answer

(A) When a body is thrown vertically upwards,at the highest point,its velocity becomes $0 \ m/s$.However,the gravitational force continues to act on it,resulting in a constant downward acceleration of $g \approx 9.8 \ m/s^2$.Thus,a body can have acceleration even when its velocity is zero at a specific instant.Therefore,the $Assertion$ is correct.When a body reverses its direction of motion,it must momentarily come to rest (velocity becomes zero) before moving in the opposite direction.This change in velocity is caused by the acceleration acting on the body.Thus,the $Reason$ is correct and it provides a valid explanation for why the velocity can be zero while acceleration is non-zero.

$Assertion$ : $A$ body can have acceleration even if its velocity is zero at a given instant of time.
$Reason$ : $A$ body is momentarily at rest when it reverses its direction.

Similar Questions

From the top of a $64\, ft$ high tower,a stone is thrown upwards vertically with the velocity of $48\, ft/s$. The greatest height (in $ft$) attained by the stone,assuming the value of the gravitational acceleration $g = 32\, ft/s^2$,is

$A$ ball is thrown vertically upwards from the top of a tower at $4.9 \ m/s$. It strikes the pond near the base of the tower after $3 \ s$. The height of the tower is........$m$

$A$ food packet is dropped from a helicopter rising up with a velocity of $4 \, ms^{-1}$. The velocity of the packet after $3 \, s$ will be ....... $ms^{-1}$. (in $.4$)

$A$ ball is thrown up vertically with a certain velocity so that it reaches a maximum height $h$. Find the ratio of the times at which it is at height $\frac{h}{3}$ while going up and coming down respectively.

Vedclass Test Series

Exam Paper Generator

Online Exam Module

$Assertion$ : $A$ body can have acceleration even if its velocity is zero at a given instant of time.$Reason$ : $A$ body is momentarily at rest when it reverses its direction.