A ball of mass 0.05 kg is strike a smooth wall normally for 4time in2 second with velocity 10 metre per second is time the ball rebounds with the same speed of 10 metre per second calculate the average force of the wall

DATA:

m = 0.05 kg

Vf = 10 m/s

Vi = -10 m/s

t = 4 times hits in 2 second

The momentum  ρ is given by,

                              ρ = mV

where,

           m = mass

           V = velocity

The Equation for average force is given by,

                               F = Δρ/Δt

where,

           Δt = time taken 

           Δρ = change in momentum. Which is given by,

                               Δρ=

                       Vf = final velocity which is the rebound velocity here

                       Vi = Initial velocity which is the velocity before striking the wall

So Substitute the equation of momentum in the equation of force

                        F =

                               F =

                               F =

                               F =

                               F =

                               F = 0.5N

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2