Hi!
Although all of them might be a good answer the correct has to be <span>C. beliefs and behaviors </span>
A scalar is something that only has speed without a DIRECTION while a vector has direction. acceleration is a vector and mass is a scalar.
Answer:
d) a = 4.1 m/s²
Explanation:
m = 92 Kg
∅ = 40º
μ = 0.293
a = ?
We can obtain the forces in the direction x' (of motion)
Wx' = W*Sin ∅ = m*g*Sin ∅
Ffriction = μ*N = μ*m*g*Cos ∅
then we use Newton's 2nd Law as follows:
Wx' - Ffriction = m*a
m*g*Sin ∅ - μ*m*g*Cos ∅ = m*a
⇒ a = g*(Sin ∅ - μ*Cos ∅)
⇒ a = (9.81 m/s²)*(Sin 40º - 0.293*Cos 40º)
⇒ a = 4.1038 m/s²