## Applied Mechanics and Graphic Statics Pick up the correct statement from the following. A rubber ball when strikes a wall rebounds but a lead ball of same mass and velocity when strikes the same wall, falls down

Momentum of rubber ball is less than that of lead ball
Rubber and lead balls undergo equal changes in momentum
None of these
Change in momentum suffered by lead ball is less that of rubber ball

## Applied Mechanics and Graphic Statics In simple harmonic motion, acceleration of a particle is proportional to

Velocity
Displacement
Rate of change of velocity
Direction

## Applied Mechanics and Graphic Statics A body of weight ‘w’ placed on an inclined plane is acted upon by a force ‘P’ parallel to the plane which causes the body just to move up the plane. If the angle of inclination of the plane is ‘θ’ and angle of friction is ‘φ’, the minimum value of ‘P’, is

w sin (θ - φ)/cos φ
w sinθ cos(θ - φ)/sin φ
w sin (φ - θ)/cos φ
w cos (θ + φ)/cos φ

0.4
0.3
0.55
0.5

981 dyne
1/9.81 kg. wt
9.81 kg. wt
1 kg. wt

π √(2l/g)
π √(l/g)
π √(g/2l)
π √(l/2g)