½μ
μ

Applied Mechanics and Graphic Statics A rigid body suspended vertically at a point and oscillating with a small amplitude under the action of the force of gravity, is called

Second's pendulum
Simple pendulum
Compound pendulum
None of these

Applied Mechanics and Graphic Statics A system of coplanar forces is in equilibrium when

All the forces are concurrent
Both force polygon" and funicular polygon close
Force polygon closes
Funicular polygon closes

On the poles
On 45° latitude
On equator
On 30° latitude

Applied Mechanics and Graphic Statics A bullet weighing 10 gm moves with a velocity of l km/sec. Its kinetic energy is (i) 5000 Nm (ii) 5000 kg.m (iii) 5000 J

Only (ii)
Both (ii) and (iii)
Both (i) and (iii)
All (i), (ii) and (iii)

Applied Mechanics and Graphic Statics ‘ω’ rad/sec is the angular velocity of a crank whose radius is ‘r’. If it makes θ° with inner dead centre and obliquity of the connecting rod ‘l’ is ‘ϕ’, the velocity v of the piston, is given by the equation

ω² (l cos ϕ + r sin ϕ tan θ)
ω (l sin ϕ + r cos ϕ tan θ)
ω² (l sin ϕ - r cos θ tan ϕ)
ω² (l sin ϕ + r cos φ tan θ)