Answer:
μ ≈ 0.238
a ≈ 0.441 m/s²
Explanation:
a) F = ma (a = 0 constant velocity)
Fcosθ - μN = 0
μ = Fcosθ / N
μ = Fcosθ / (mg + Fsinθ)
μ = 310cos20 / (1120 + 310sin20)
μ = 0.2376007... ≈ 0.238
b)
Fcosθ - μN = ma
a = (Fcosθ - μN) / m
a = (Fcosθ - μ(mg - Fsinθ) / m
a = (310cos20 - 0.2376(1120 - 310sin20) / (1120/9.81)
a = 0.441308... ≈ 0.441 m/s²
Answer:
the address that you're going to draw are supposed to be in a straight line and their supposed to meet at the same place that is the centre of the Earth because the force of gravity pulls things towards the centre of the Earth
"Ocean waves" is the only example of mechanical waves on that list.
The other three choices are all electromagnetic waves.
B. The sound of the engine will get louder and the pitch higher.