Answer:
The magnitude of Adams' force is 88 N
Step-by-step explanation:
According to Newton's law ∑ forces in direction of motion is equal to
mass multiplied by the acceleration
There are two forces here the friction force and Adams' force
Adams' force is in direction of motion
Friction force is opposite to direction of motion
→ Friction force = μ R,
where μ is the coefficient of friction and R is the normal reaction force
of the boat
→ R = mg
where m is the mass of the boat and g is the acceleration of gravity
→ m = 47 kg , g = 9.8 m/s²
→ R = mg
Substitute the values in the rule
→ R = 47 × 9.8 = 460.6 N
→ Friction force = μ R
→ μ = 0.13 , R = 460.0 N
Substitute the values in the rule
→ Friction force = 0.13 × 460.0 = 59.878 N
→ ∑ Forces in direction of motion = mass × acceleration
→ F - Friction force = mass × acceleration
→ Friction force = 59.878 N , m = 47 kg , a = 0.6 m/s²
Substitute the values in the rule
→ F - 59.878 = 47 × 0.6
→ F - 59.878 = 28.2
Add 59.878 to both sides
→ F = 88.078 N ≅ 88 N
The magnitude of Adams' force is 88 N