Question

A roller skater of 47kg moving with a velocity of 12 m/s to the east picks up a bag of 6.0 kg. What is the final velocity of the person traveling with the basket? show your work HINT: Use the law of conservation of momentum in the perfectly inelastic collision m1v1i + m2v2i = (m1+m2) vf

plz guys i have exam now answer her quikly

Answer 1

v_f = 10.85 m/s

Step-by-step explanation:

We will apply the law of conservation of momentum here:

`m_(1)v_(1i) + m_(2)v_(2i) = m_(1)v_(1f)+m_(2)v_(2f)\\`

where,

m₁ = mass of roller skater = 47 kg

m₂ = mass of bag = 6 kg

v_1i = initial speed of roller skater = 12 m/s

v_2i = initial speed of the bag = 0 m/s

v_1f = final speed of the roller skater = ?

v_2f = final speed of the bag = ?

Both the bag and the skater will have same speed at the end because kater is carrying the bag:

v_1f = v_2f = v_f

Therefore, the equation will become:

`(47\ kg)(12\ m/s)+(6\ kg)(0\ m/s)=(47\ kg)(v_(f))+(5\ kg)(v_(f))\\564\ N.s = (47\ kg+5\ kg)(v_(f))\\v_(f) = (564\ N.s)/(52\ kg)\\`

v_f = 10.85 m/s