The resultant of two forces acting at right angles is √34 kg and acting at 60° is 70 kg. The forces are 3 kg and 5 kg √3 kg and √5 kg 2 kg and 3 kg 1 kg and 4 kg TRUE ANSWER : ? YOUR ANSWER : ?
Time period and length of a second’s pendulum respectively are 2 sec and 92.7 cm 1 sec and 99.4 cm 2 sec and 99.4 cm 1 sec and 92.7 cm TRUE ANSWER : ? YOUR ANSWER : ?
Two objects moving with uniform speeds are 5 m apart after 1 second when they move towards each other and are 1 m apart when they move in the same direction.The speeds of the objects are: 2 m/sec and 2 m/sec 3 m/sec and 3 m/sec 4 m/sec and 6 m/sec 3 m/sec and 2 m/sec TRUE ANSWER : ? YOUR ANSWER : ?
The following statement is one of the laws of Dynamic friction For moderate speeds the force of friction remains constant but decreases slightly with the increase of speed The magnitude of the kinetic friction bears a constant ratio to the normal reaction between two surfaces. The ratio being slightly less than that in the case of limiting friction All of these The force of friction always acts in a direction opposite to that in which a body is moving TRUE ANSWER : ? YOUR ANSWER : ?
At the instantaneous center, the velocity of the moving lamina at any instant is Varying Zero Maximum Minimum TRUE ANSWER : ? YOUR ANSWER : ?
Varingon’s theorem of moment’s states Algebraic sum of the moments of two forces about any point, is equal to the moment of their resultant about that point Arithmetical sum of the moments of two forces about any point, is equal to the moments of their resultant about that point Arithmetical sum of the moments of the forces about any point in their plane, is equal to the moment of their resultant about that point Algebraic sum of the moments of the forces about any point in their plane, is equal to the moment of their resultant about that point TRUE ANSWER : ? YOUR ANSWER : ?
In SI units, the units of force and energy are respectively Dyne and erg Newton and watt Newton and joule kg wt and joule TRUE ANSWER : ? YOUR ANSWER : ?
The ends of a string weighing w/metre are attached to two points at the same horizontal level. If the central dip is very small, the horizontal tension of the string throughout is wl²/4d wl²/16d wl²/8d wl/4d TRUE ANSWER : ? YOUR ANSWER : ?
A cylinder will slip on an inclined plane of inclination 0 if the coefficient of static friction between plane and cylinder is less than (2/3) sin 6 less than (1/3) sin 6 less than (1/3) tan 0 less than (2/3) tan 0 TRUE ANSWER : ? YOUR ANSWER : ?
The angular speed of a car taking a circular turn of radius 100 m at 36 km/hr will be 1 rad/sec 100 rad/sec 0.1 rad/sec 10 rad/sec TRUE ANSWER : ? YOUR ANSWER : ?