Question

can anyone tell me these quo fast ...17 one ☆☆☆ brainlest promise correct answer

Answer 1

ke = 1/2(mv²)
substite the values in eqn u will get the answer as given in question take mass in kg
a = 12500 m/s² from v²-u²=2as
substitute it in F = ma then u will get force as 625N

Answer 2

Hii friend,

Here is your answer_______________

Given ,

Velocity (v)=> 500m/s.

Mass (kg) =>0.05 kg (5g)

{1 kg => 1000g}

(a) Kinetic energy:-

Kinetic energy =>1/2 mv²

K.E => 1/2 ×0.05×500×500

K.E => 6250 Joules.

(B) Force:-

We need to find acceleration.

:-velocity = distance/time

time= distance/velocity

time= 10/500

time= 0.02 secs....

Acceleration = velocity/time

acceleration = 500/0.02

acceleration =25000m/s²

We know the formula,

F=> ma

:-F => 0.05 ×25000

F= 1250 N

Average regarding force => 1250/2

average retarding force => 625N.

Hope this helps you a little!!!