Question

The initial velocity of the particle is $10 \mathrm {~m} / \mathrm { sec }$ and its retardation is $2 m / \sec ^ { 2 }$ . The distance moved by the particle in 5 th second of its motion is

• A. $1 m$
• B. 19 m
• C. 50 m
• D. 75 m

Answer 1

Answer: (A)

$1 m$

Answer 2

$S _ { n } = u - \frac { a } { 2 } ( 2 n - 1 )$ $= 10 - \frac { 2 } { 2 } ( 2 \times 5 - 1 ) = 1$ meter