Answer:
The force is 211.19 N.
Explanation:
Given that,
Mass = 7.0 kg
Distance = 2.8 m
Speed = 13 m/s
We need to calculate the acceleration
Using equation of motion
\(v^2=u^2+2as\)
Put the value in the equation
\(13^2=0+2\times a\times2.8\)
\(a=\dfrac{13^2}{2\times2.8}\)
\(a=30.17\ m/s^2\)
We need to calculate the force
Using newton's second law
\(F = ma\)
Put the value into the formula
\(F = 7.0\times30.17\)
\(F = 211.19\ N\)
Hence, The force is 211.19 N.