The angular acceleration of a flywheel decreases uniformly from 8 rad/sec2 to 2 rad sec2 in 6 sec at which time its angular velocity is 42 rad/sec. The initial angular velocity was
A.3 rad/sec
B.6 rad/sec
C.12 rad/sec
D.24 rad/sec
E.30 rad/sec
Category: Applied Mechanics Mcqs
In the speed of rotation of earth decreases, the weight of the body will
A.Increase
B.Decrease
C.Remain unaltered
D.Depends on speed ratio
E.Cannot be ascertained on the basis the information given
A framed structure is perfect if it contains members equal to
A.n – 3
B.n – 2
C.2n – 1
D.2n – 2
E.2n – 3
If you want to stop the car in the shortest distance on an icy road, you should
A.push hard the brakes to lock the wheels
B.push just hard enough to prevent slipping
C.pump’ the brakes
D.not apply the brakes
What will be the duration of day and night if the earth shrinks to half the present radius?
A.24 hours
B.12 hours
C.6 hours
D.3 hours
According to the principle of transmissibility of forces, when a force acts upon a body ; its effect is
A.Minimum when it acts at C.G. of the body
B.Maximum when it acts at C.G. of the body
C.Different at different points of body
D.Same at every point in its line of action
E.None of the above
A bullet is fired vertically upwards with a velocity of 2200 ft/s. Bullet ascends to a height of
A.48.300 ft
B.56,900 ft
C.65,800 ft
D.75,000 ft
The common acceleration will be
A.1.0 m/s2
B.1.5 m/s2
C.3 m/s2
D.6 m/s2
The necessary condition of equilibrium of a body is
A.The algebraic sum of horizontal components of all forces must be zero
B.The algebraic sum of vertical components of all forces must be zero
C.The algebraic sum of forces about a point must be zero
D.All the above
E.None of the above
