Related Questions
What is the correct answer?
4
If the linear velocity of a point on the rim of a wheel of 10 m diameter, is 50 m/sec, its angular velocity will be
What is the correct answer?
4
A stone is whirled in a vertical circle, the tension in the string, is maximum
A. When the string is horizontal
B. When the stone is at the highest position
C. When the stone is at the lowest position
What is the correct answer?
4
A block in the shape of a parallelepiped of sides 1m × 2m × 3m lies on the surface. Which of the faces gives maximum stable block?
D. Equally stable on all faces
What is the correct answer?
4
The force acting on a point on the surface of a rigid body may be considered to act
A. At the centre of gravity of the body
B. On the periphery of the body
C. On any point on the line of action of the force
D. At any point on the surface normal to the line of action of the force
What is the correct answer?
4
The displacement of a particle which moves along a straight line is given by S = 4t3 + 3t2- 10 where S is in meters and t is in seconds. The time taken by the particle to acquire a velocity of 18 m/sec from rest, is
What is the correct answer?
4
The Centre of gravity of a 10 × 15 × 5 cm T-section from its bottom, is
What is the correct answer?
4
The angle which an inclined surface makes with the horizontal when a body placed on it is on the point of moving down, is called
What is the correct answer?
4
u1 and u2 are the velocities of approach of two moving bodies in the same direction and their corresponding velocities of separation are v1 and v2. As per Newton's law of collision of elastic bodies, the coefficient of restitution (e) is given by
What is the correct answer?
4
For a given velocity of a projectile, the range is maximum when the angle of projection is
What is the correct answer?
4
An ordinate in a funicular polygon represents
What is the correct answer?
4
The apparent weight of a man in a moving lift is less than his real weight when it is going down with
What is the correct answer?
4
A ball moving on a smooth horizontal table hits a rough vertical wall, the coefficient of restitution between ball and wall being 1/3. The ball rebounds at the same angle. The fraction of its kinetic energy lost is
What is the correct answer?
4
The locus of the instantaneous centre of a moving rigid body, is
What is the correct answer?
4
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
What is the correct answer?
4
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
What is the correct answer?
4
One Newton is equivalent to
What is the correct answer?
4
A body of weight 14 g appears to weight 13 g when weighed by a spring balance in a moving lift. The acceleration of the lift at that moment was
What is the correct answer?
4
When a body of mass M1 is hanging freely and another of mass M2 lying on a smooth inclined plane(α) are connected by a light index tensile string passing over a smooth pulley, the acceleration of the body of mass M1, will be given by
A. g(M1 + M2 sin α)/(M1 + M2) m/sec
B. g(M1 - M2 sin α)/(M1 + M2) m/sec²
C. g(M2 + M1 sin α)/(M1 + M2) m/sec²
D. g(M2 × M1 sin α)/(M2 - M1) m/sec²
What is the correct answer?
4
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 efficiency of the lifting machine is
What is the correct answer?
4
A simple pendulum of length l has an energy E, when its amplitude is A. If the length of pendulum is doubled, the energy will be
What is the correct answer?
4
A smooth cylinder lying on its convex surface remains
B. In unstable equilibrium
C. In neutral equilibrium
What is the correct answer?
4
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,
What is the correct answer?
4
A shell travelling with a horizontal velocity of 100 m/sec explodes and splits into two parts, one of mass 10 kg and the other of 15 kg. The 15 kg mass drops vertically downward with initial velocity of 100 m/sec and the 10 kg mass begins to travel at an angle to the horizontal of tan1 x, where x is
What is the correct answer?
4
If the gravitational acceleration at any place is doubled, the weight of a body, will
What is the correct answer?
4
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 The correct answer is
D. All (i), (ii) and (iii)
What is the correct answer?
4
A point subjected to a number of forces will be in equilibrium, if
A. Sum of resolved parts in any two directions at right angles, are both zero
B. Algebraic sum of the forces is zero
C. Two resolved parts in any two directions at right angles are equal
D. Algebraic sum of the moments of the forces about the point is zero
What is the correct answer?
4
If a particle moves with a uniform angular velocity ω radians/sec along the circumference of a circle of radius r, the equation for the velocity of the particle, is
What is the correct answer?
4
Pick up the correct statement from the following:
A. If two equal and perfectly elastic smooth spheres impinge directly, they interchange their velocities
B. If a sphere impinges directly on an equal sphere which is at rest, then a fraction ½(1 - e2) the original kinetic energy is lost by the impact
C. If two equal spheres which are perfectly elastic impinge at right angles, their direction after impact will still be at right angles
What is the correct answer?
4
The angle of projection at which the horizontal range and maximum height of a projectile are equal to
What is the correct answer?
4
A vehicle weighing w kg is to run on a circular curve of radius r. If the height of its centre of gravity above the road level is h and the distance between the centres of wheels is 2a, the maximum velocity, in order to avoid over turning, will be