Question

which would require a greater force accelarating at
$5 ms - 2 or \: a \: 4kg \: mass \: at \: 2ms - 2$
​

Answer 1

Explanation:

cant understand the numbers but here is the theory

you want to stop them by force hence force = ma

so product of mass and acc.

mass given i think

acc you can find out by the eqn = v^2 - u^2 = 2as

here put v 0 as final velocity is zero..