ANSWER:
[tex]\huge\boxed{0.5newton}[/tex]_____________________________________
DATA:
m = 0.05 kg
Vf = 10 m/s
Vi = -10 m/s
t = 4 times hits in 2 second
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SOLUTION:
The momentum ρ is given by,
ρ = mV
where,
m = mass
V = velocity
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The Equation for average force is given by,
F = Δρ/Δt
where,
Δt = time taken
Δρ = change in momentum. Which is given by,
Δρ=[tex]MVf-Mvi[/tex]
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 = [tex]\frac{MVf - MVi}{t}[/tex]
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SUBSTITUTING THE VARIABLES IN THE EQUATION
F = [tex]\frac{MVf - MVi}{t}[/tex]
F = [tex]\frac{(0.05x10) - (0.05x-10)}{2}[/tex]
F = [tex]\frac{(0.5 + 0.5)}{2}[/tex]
F = [tex]\frac{1}{2}[/tex]
F = 0.5N
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0.5 NEWTON is the average force on the wall
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