Motion under several forces
Answers are for parents and teachers.
1
A 20 kg body is pulled horizontally with F = 100 N; the friction coefficient is 0.2 (g = 10 m/s²). What is the acceleration (m/s²)?
3
2
A frictionless incline with α = 37° (sin = 0.6). What is the acceleration down it (m/s²)? (g = 10 m/s²)
6
3
Loads of 2 kg and 6 kg on a pulley (g = 10 m/s²). What is the acceleration (m/s²)?
5
4
What is the string tension (N) for those loads?
30
5
Why does a body not slide on a 25° incline with μ = 0.5? (tan25° ≈ 0.47)
tan25° ≈ 0.47 < μ = 0.5, so the condition tanα ≤ μ holds.