Question

Rocket-powered sleds are used to test the human response to acceleration. If a rocket-powered sled is accelerated to a speed of $444m/s$ in $1.83$ seconds, then what is the acceleration? (in $m/s^2$)

• A. $243m/s/s$
• B. $24m/s/s$
  
• C. $23m/s/s$
  
• D. $43m/s/s$
  

Answer 1

The correct option is A $243m/s/s$

Given, initial velocity $u=0m/s,$ final velocity $v=444m/s$ and time $t=1.83s$

If $a$ be the acceleration.

Using $v=u+at$,

we get $444=0+a\left(1.83\right)$

$⟹$ $a=444/1.83=242.62\sim 243m/s^2$