Q. Joule is the unit of

View solution

Q. The maximum velocity of a body vibrating with a simple harmonic motion of amplitude 150 mm and frequency 2 vibrations/sec, is

View solution

Q. Pick up the correct statement from the following :

View solution

Q. If the radius of the earth is 600 km the height of a mountain above sea level at the top of which a beat seconds pendulum at sea level, looses 27 seconds a day, is

View solution

Q. The total time of collision and restitution of two bodies, is called

View solution

Q. The length of a Second's pendulum, is

View solution

Q. If the tension in a cable supporting a lift moving upwards is twice the tension when the lift is movng downwards, the acceleration of the lift, is

View solution

Q. One Newton force, is

View solution

Q. The masses of two balls are in the ratio of 2 : 1 and their respective velocities are in the ratio of 1 : 2 but in opposite direction before impact. If the coefficient of restitution is 1/2 , the velocities of separation of the balls will be equal to

View solution

Q. The angle which an inclined surface makes with the horiontal when a body placed on it is on the point of moving down, is called

View solution

Q. Work may be defined as

View solution

Q. The centre of gravity of a triangle is at the point where three

View solution

Q. The forces which meet at one point and have their lines of action in different planes are called

View solution

Q. At a given instant ship A is travelling at 6 km/h due east and ship B is travelling at 8 km/h due north. The velocity of B relative to A is

View solution

Q. The equation of motion of a particle starting from rest along a straight line is x = t³ - 3t² + 5. The ratio of the accelerations after 5 sec and 3 sec will be

View solution

Q. The locus of the instantaneous centre of a moving rigid body, is

View solution

Q. If three rigid rods are hinged together to form a triangle and are given rotary as well as translatory motion, the number of instantaneous centres of the triangle, will be

View solution

Q. The mechanical advantage of an ideal machine is 100. For moving the local through 2 m, the effort moves through

View solution

Q. When a body in equilibrium undergoes an infinitely small displacement, work imagined to be done, is known as

View solution

Q. To attain the synchronous orbit, the launch of a satellite, is done from a place

View solution