a 70-kg man pushes a 50-kg man by a force of 50 N. by what force has the 50-kg man the pushed the other man.
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Given,
m₁=70kg
m₂=50kg
F=50N
The force of m1,
F=ma
50=70.a
50/70=a
5/7m/s square=a
The force of m2
F=ma
F=50N
m₁=70kg
m₂=50kg
F=50N
The force of m1,
F=ma
50=70.a
50/70=a
5/7m/s square=a
The force of m2
F=ma
F=50N
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Given:
Mass of man1 = 70 kg
Mass of man2 = 50 kg
Force = 50 N
To find:
The force needed by man2 to push man1
Solution:
By formula,
Normal= Mass * Gravity
Where,
Gravity = 9.8 m / s
Substituting,
50 × 9.8
Normal = 490 N
To find friction,
Friction = r * Normal
Where,
r is coefficient of static friction
We know,
Ideally,
Frictional Force = Normal Reaction Force.
∴ 50 = r × N
50 = r × 490
r = 0.102
Hence,
Force = 0.102 × 70 × 9.8
Force = 69.9 N
Therefore, Force ≅ 70 N
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