Question

Please answer this question

Answer 1

Answer:

hii your answer in pic

right option is

10m/s

Answer 2

Explanation:

Given,

m=200kg

s=20m

F = -500N

it will be at rest after applying brakes

so, Final velocity = v = 0

we have to find initial velocity u

we know that force,

f=ma

a=f/m

a= -500/200

a= -2.5m/s²

we know, v²= u²+2as

u²=v²-2as

u²= 0² - (2×(-2.5)×20)

u²= -(-100)

u² = 100

u = 10m/s