Answer:
8.4 kN
Explanation:
Change in momentum = m₁v₁- m₂v₂ = m(v₁-v₂) = 1.2[8 - (-6)] = 16.8kgm/s
v₂ has been taken as negative because velocity of object colliding ball as +ve. Both are in opposite directions.
Change in momentum = impulse = Force × Time
Time = 2 ms = 2 milli seconds = 0.002 s.
Force = Change in momentum/Time = 16.8/0.002 = 8.4kN
The appropriate answer is Option b (8.4 kN).
Given values are:
Mass of the object,
m = 1.2 kg
Initial speed,
u = 8 m/s
Final speed,
v = -6 m/s
Time,
t = 2 ms
or,
= [tex]2\times 10^3 \ s[/tex]
Now,
→ The Force is:
[tex]Force = \frac{Impulse}{Time}[/tex]
[tex]=\frac{m(v-u)}{t}[/tex]
By substituting the values, we get
[tex]=\frac{1.2(8+6)}{2\times 10^{-3}}[/tex]
[tex]=\frac{1.2\times 14}{2\times 10^{-3}}[/tex]
[tex]=8400 \ N[/tex]
or,
[tex]=8.4 \ kN[/tex]
Thus the above is the correct solution.
Learn more about force here:
https://brainly.com/question/19586626
