A ladder is resting on a rough ground and leaning against a smooth vertical wall. The force of friction will act Perpendicular to the wall at its upper end Downward at its upper end Upward at its upper end Zero at its upper end TRUE ANSWER : ? YOUR ANSWER : ?
The force required to move the body up the plane will be minimum if it makes an angle with the inclined plane __________ the angle of friction. Less than Greater than None of these Equal to TRUE ANSWER : ? YOUR ANSWER : ?
The rate of change of momentum is directly proportional to the impressed force, and takes place in the same direction in which the force acts. This statement is known as Newton's second law of motion Newton's third law of motion Newton's first law of motion None of these TRUE ANSWER : ? YOUR ANSWER : ?
On the ladder resting on the ground and leaning against a smooth vertical wall, the force of friction will be Upwards at its upper end Zero at its upper end Perpendicular to the wall at its upper end Downwards at its upper end TRUE ANSWER : ? YOUR ANSWER : ?
The loss of kinetic energy during inelastic impact, is given by (where m1 = Mass of the first body,m2 = Mass of the second body, and u1 and u2 = Velocities of the first and second bodies respectively.) [m₁ m₂/2(m₁ + m₂)] (u₁ - u₂)² [m₁ m₂/2(m₁ + m₂)] (u₁² - u₂²) [2(m₁ + m₂)/m₁ m₂] (u₁ - u₂)² [2(m₁ + m₂)/m₁ m₂] (u₁² - u₂²) TRUE ANSWER : ? YOUR ANSWER : ?
During elastic impact, the relative velocity of the two bodies after impact is __________ the relative velocity of the two bodies before impact. Less than Equal and opposite to Equal to Greater than TRUE ANSWER : ? YOUR ANSWER : ?
The centre of gravity of an isosceles triangle with base (p) and sides (q) from its base is (p² + q²)/4 (4p² - q²)/6 [√(4p² - q²)]/6 (p² - q²)/4 TRUE ANSWER : ? YOUR ANSWER : ?
The rate of change of displacement of a body is called Momentum Acceleration Velocity None of these TRUE ANSWER : ? YOUR ANSWER : ?
If a number of forces are acting at a point, their resultant is given by √[(∑V)2 + (∑H)2] (∑V)2 +(∑H)2 +2(∑V)(∑H) √[(∑V)2 +(∑H)2 +2(∑V)(∑H)] (∑V)2 + (∑H)2 TRUE ANSWER : ? YOUR ANSWER : ?
A force while acting on a body may All of these Balance the forces, already acting on it Change its motion Give rise to the internal stresses in it TRUE ANSWER : ? YOUR ANSWER : ?