Question

plsss answer this question​

Answer 1

Here,

$m = 50g = 50 \times {10}^{ - 3} kg = 5 \times {10}^{ - 2} kg$

$u = 100m {s}^{ - 1}$

$t = 2s$

$s = 4cm = 4 \times {10}^{ - 2} m$

$v = 0m {s}^{ - 1}$

(i) Initial momentum,

$= > 5 \times {10}^{ - 2} \times 100 = > 5 \: kg \: m \: {s}^{ - 1}$

(ii) Final momentum,

$= > 5 \times {10}^{ - 2} \times 0 = 0 \: kg \: m \: {s}^{ - 1}$

(iii) Retardation caused by block,

$= > \frac{(0 - 100)}{2} = \frac{ - 100}{2} = - 50 \: m \: {s}^{ - 2}$

(iv) Resistive force exerted by block,

$= > 5 \times {10}^{ - 2} \times ( - 50) = - 250 \times {10}^{ - 2} = - 2.5 \: newtom$

Hope this answer helps you ^_^ !