Answer:
a) Acceleration while the toboggan is going uphill = 8.85 m/s²
b) Acceleration of the toboggan is going downhill = 4.76 m/s²
Explanation:
Resolving the normal reaction into vertical and horizontal component
Nₓ = mg sin θ
Nᵧ = mg cos θ
The frictional force on the toboggan = Fr = μmg cos θ (note that μ = μ(k) = the coefficient of kinetic friction)
Doing a Force balance on the x component taken in the axis parallel to the inclined plane.
The net force that has to accelerate the toboggan has to match the frictional force acting downwards of the plane (In the opposite direction to motion) and x-component of the Normal reaction
ma = Nₓ + Fr
ma = (mg sin θ) + (μmg cos θ)
a = g[(sin 44°) + (0.29 cos 44°)
a = 9.8(0.6947 + 0.2086) = 8.85 m/s²
b) While coming downhill,
The frictional force is acting uphill now (In the direction opposite to motion),
The force balance is
ma = (mg sin θ) - (μmg cos θ)
a = g[(sin 44°) - (0.29 cos 44°)]
a = 9.8(0.6947 - 0.2086)
a = 4.76 m/s²
That one's hard but I'm not really sure what the answer is
Answer:
false
Explanation:
inertia deals with movement!
Answer: Option (a) is the correct answer.
Explanation:
Resources which are created by human beings are known as man-made resources.
For example, glass, rayon, nylon etc are all man-made resources.
Whereas resources which are naturally created are known as natural resources.
For example, wind, air, water etc are all natural resources.
Thus, we can conclude that out of the given options time is not a natural resource.
