Respuesta :
Answer:
(a) 446.88 N
(b) 241.08 N
Explanation:
m = 60 kg, μs = 0.760, μk = 0.410
(a) To just start the crate moving: the coefficient of friction is static.
F = μs m g
F = 0.760 x 60 x 9.8
F = 446.88 N
(b) To slide the crate with constant speed: the coefficient of friction is kinetic.
F = μk m g
F = 0.410 x 60 x 9.8
F = 241.08 N
Static friction is the friction that occurs in the body when the body is just about to move. The static friction force will be 446.88 N.While the kinetic friction force will be 241.08 N.
What is the friction force?
It is a type of opposition force acting on the surface of the body that tries to oppose the motion of the body. its unit is Newton (N).
Mathematically it is defined as the product of the coefficient of friction and normal reaction.
m is the mass of crate  = 60 kg
μs is the coefficient of static friction = 0.760
μk  is the coefficient of kinetic friction= 0.410
(a) Static friction is the friction that occurs in the body when the body is just about to move.
[tex]\rm F_s = \mu_s m g\\\\\rm F_s = 0.760\times60\times9.8\\\\\rm F_s = 446.88 N[/tex]
Hence static friction force will be 446.8 N.
(b) When the body is moving in a straight and inclined plane the value of friction force acting on the body is known as kinetic friction.
[tex]\rm F_k = \mu_km g\\\\\rm F_k = 0.410\times60\times9.8\\\\\rm F_k= 241.08\; N[/tex]
Hence kinetic friction force will be 241.08 N.
To learn more about friction force refer to the link;
https://brainly.com/question/1714663
