Answer:
- You see lightning before you hear thunder.
- You see a rock fall before you hear its sound.
Explanation:
Brainliest???
the minimum amount of horizontal force that the man will need to apply so
that the tree will start moving?
A. 240 N
B. 360 N
C. 480 N
D. 120 N
Answer:
120 N
Explanation: First we shoud consider the forces acted on a tree
Friction foce - acting opposite to the moving direction
Weight - Directly acting downwards
Reaction - Directly acting on upwards
For minimum required force should be equal to the friction force
F = μ R
F = 0.5×480
= 120N
Answer:
400 m
Explanation:
Given:
v₀ = 20 m/s
a = 4 m/s²
t = 10 s
Find: Δx
Δx = v₀ t + ½ at²
Δx = (20 m/s) (10 s) + ½ (4 m/s²) (10 s)²
Δx = 400 m