Transmission of motion and the horizontally thrown body
Answers are for parents and teachers.
1
A body is thrown horizontally at 8 m/s from a height of 5 m (g = 10 m/s²). What is the range (m)? (t = 1 s)
8
2
A large pulley with R₁ = 25 cm turns at ν₁ = 20 s⁻¹ and drives a small pulley with R₂ = 5 cm by a belt. What is ν₂ (s⁻¹)?
100
3
A gear has N₁ = 36 teeth at ν₁ = 5 s⁻¹. The meshing gear turns at ν₂ = 20 s⁻¹. How many teeth N₂ does it have?
9
4
A body thrown horizontally at 20 m/s lands after 3 s (g = 10 m/s²). What is the launch height (m)?
45
5
What motion does a sewing machine produce from rotation? Name another mechanism of this kind.
The needle’s up-and-down reciprocating motion; for example, the crank–connecting-rod mechanism in an engine.