Q. A marble ball is rolled on a smooth floor of a room to hit a wall. If the time taken by the ball in returning to the point of projection is twice the time taken in reaching the wall, the coefficient of restitution between the ball and the wall, is

View solution

Q. A number of forces acting simultaneously on a particle of a body

View solution

Q. The force acting on a point on the surface of a rigid body may be considered to act

View solution

Q. A satellite is said to move in a synchronous orbit if it moves at an altitude of 36, 000 km with a maximum velocity of about

View solution

Q. Two shots fired simultaneously from the top and bottom of a vertical tower with elevations of 30° and 45° respectively strike a target simultaneously. If horizontal distance of the target from the tower is 1000 m, the height of the tower is

View solution

Q. A stone of mass 1 kg is tied to a string of length 1 m and whirled in a horizontal circle at a constant angular speed 5 rad/sec. The tension in the string is,

View solution

Q. The ratio of the moment of inertia of a rectangle about its centroidal axis to the moment of inertia about its base, is

View solution

Q. The apparent weight of a man in a moving lift is less than his real weight when it is going down with

View solution

Q. P is the force acting on a body whose mass is m and acceleration is f. The equation P - mf = 0, is known as

View solution

Q. Pick up the incorrect statement from the following :

View solution

Q. A 49 kg lady stands on a spring scale in an elevator. During the first 5 sec, starting from rest, the scale reads 69 kg. The velocity of the elevator will be

View solution

Q. 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

View solution

Q. The instantaneous centre of a member lies at the point of intersection of two lines drawn at the ends of the member such that the lines are inclined to the direction of motion of the ends at

View solution

Q. A rod 5 m in length is moving in a vertical plane. When it is inclined at 60° to horizontal, its lower end is moving horizontally at √3 m/sec and upper end is moving in vertical direction. The velocity of its upper end, is

View solution

Q. The units of inertia of mass, are

View solution

Q. A sphere is resting on two planes BA and BC which are inclined at 45° and 60° respectively with the horizontal. The reaction on the plane BA will be

View solution

Q. A projectile is fired at an angle θ to the vertical. Its horizontal range will be maximum when θ is

View solution

Q. A load of 500 kg was lifted through a distance of 13 cm. by an effort of 25 kg which moved through a distance of 650 cm. The mechanical advantage of the lifting machine is

View solution

Q. In simple harmonic motion, acceleration of a particle is proportional to

View solution

Q. A heavy ladder resting on a floor and against a vertical wall may not be in equilibrium, if

View solution