Question

Answer the question in the given picture of physics

Answer 1

Given:

mass(m)=500g

Converting g into kg..

1000g=1 kg

so 500g=?

∴$\dfrac{500×1}{1000}$

∴$\dfrac{500}{1000}$

00 will cut out

so here we get:

∴$\dfrac{5}{10}$

Now,

$\sf \green{v_1=20 \ ms^-1}$

$\sf \pink{v_2=30 \ ms^-1}$

Now find kinetic energy of in this case

$\sf \purple{k_1=m}$ $\dfrac{(v_1)^2}{2}$

∴$\sf \orange{k_1=0.5}$×$\dfrac{20^2}{2}$

∴$\sf \red{k_1=100 \ J}$

_____________________

$\sf \green{k_2=m}$ $\dfrac{(v_2)^2}{2}$

∴$\sf \blue{k_2=0.5}$×$\dfrac{30^2}{2}$

∴$\sf \pink{k_2=225 \ J}$

W=ΔK=$\sf \purple{K_2-K_1}$

So,

W=$\sf \orange{(225-100)J}$

∴W=$\sf \red{125J}$

$\large{\boxed{\mathtt{\Blue{125 \ Joule}}}}$