Choose the correct statement.

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

Question

(D) $1$. Option $A$: If a particle has a positive velocity and a positive acceleration that is decreasing (e.g.,$a = 2 - t$),the velocity will continu

Vedclass · Accepted Answer

All of these.

Vedclass · Answer

(D) $1$. Option $A$: If a particle has a positive velocity and a positive acceleration that is decreasing (e.g.,$a = 2 - t$),the velocity will continue to increase as long as $a > 0$. Thus,this is possible.$2$. Option $B$: Consider a particle moving in a straight line. If the acceleration changes sign (e.g.,from positive to negative) while the velocity is still large enough to maintain its direction,the velocity will decrease but not necessarily reverse immediately. Thus,this is possible.$3$. Option $C$: $A$ body at rest $(v = 0)$ can be accelerated if a net force acts on it (Newton's Second Law,$F = ma$). For example,an object starting from rest under gravity has an acceleration $g$ even at the instant $v = 0$. Thus,this is possible.$4$. Since all statements are correct,the correct option is $D$.

Similar Questions

Assertion $(A)$: The angle between acceleration and velocity of a body in one-dimensional motion is always zero. Reason $(R)$: One-dimensional motion is along a straight line.

$A$ particle is constrained to move on a straight line path. It returns to the starting point after $10\, s$. The total distance covered by the particle during this time is $30\, m$. Which of the following statements about the motion of the particle is false?

All the graphs below are intended to represent the same motion. One of them does it incorrectly. Pick it up.

$A$ stone is dropped into a lake from a tower $500 \ m$ high. The sound of the splash will be heard by the man approximately after ..... $s$. (Take $g = 10 \ m/s^2$ and speed of sound $v = 340 \ m/s$)

Vedclass Test Series

Exam Paper Generator

Online Exam Module