A) 
Let's start by writing the equation of the forces along the directions parallel and perpendicular to the incline:
Parallel:
(1)
where
m is the mass
g = 9.8 m/s^2 the acceleration of gravity
is the coefficient of friction
R is the normal reaction
a is the acceleration
Perpendicular:
(2)
From (2) we find
And substituting into (1)
Solving for a,
B) 5.94 m/s
We can solve this part by using the suvat equation
where
v is the final velocity
u is the initial velocity
a is the acceleration
s is the displacement
Here we have
v = ?
u = 0 (it starts from rest)
s = 8.70 m
Solving for v,
Answer:
134 kg
Explanation:
The snowmobile is moving at constant speed, so the acceleration is 0.
Sum of the forces in the x direction:
∑F = ma
F − 360 = 0
F = 360
Friction force equals the normal force times the coefficient of friction:
Nμ = 360
On level ground, the normal force equals the combined weight:
(m + 50)g μ = 360
m + 50 = 360 / (gμ)
m = -50 + 360 / (gμ)
m = -50 + 360 / (9.8 × 0.2)
m ≈ 134 kg
Round as needed.
Answer: friction
Explanation:
Because when you rub to objects together it creates static electricity
Force = mass * acceleration
Force = 5000 * 1.5
Force = 7500 N
