Respuesta :
Answer:
Explanation:
Mass of amanda and bertha car = Ma = Mb
Initial velocity of amanda, ua = 10 m/s
Final velocity of amanda, va = 20 m/s
Initial velocity of bertha, ub = 20 m/s
Final velocity of bertha, vb = 30 m/s
Workdone = change in Energy = 1/2 mv^2 - 1/2 mu^2
Ea = Ma × 1/2 × (20^2 - 10^2)
= Ma × 150
= 150 Ma J
Workdone = change in Energy = 1/2 mv^2 - 1/2 mu^2
Eb = Mb × 1/2 × (30^2 - 20^2)
= Mb × 250
= 250 Mb J
Option ii. Less than. Thus this is because the workdone by amanda car (150Ma) is less than the workdone in berthas car (250Mb).
B.
Impulse, p = force × time
p = Mass × change in velocity
pa = Ma × va - Ma × ua
= Ma × (20 - 10)
= 10 × Ma
= 10 Ma
p = Mass × change in velocity
pa = Mb × vb - Mb × ub
= Mb × (30 - 20)
= 10 × Mb
= 10 Mb
Option iii. The same as.
The impulse as seen above is the same in amanda car (10Ma) as the same with bertha (10Mb)
