If y is force and x is velocity, then dimensions of —=r are dx2 M2L’T3 M’^T’ M’L-‘T1 M’L-‘T0 TRUE ANSWER : ? YOUR ANSWER : ?
The acceleration of a train starting from rest at any instant is 1/6(V + 1) m/sec² where ‘V’ is the velocity of the train in m/sec. The train will attain a velocity of 36 km/hour after travelling a distance of 2100 m 2000 m 2200 m 2300 m TRUE ANSWER : ? YOUR ANSWER : ?
A ladder of weight 'w' rests against a smooth vertical wall, and rests on rough horizontal ground, the coefficient of friction between the ladder and the ground being 1/4. The maximum angle of inclination of the ladder to the vertical, if a man of weight 'w' is to walk to the top of it safely, is tan'1 x, where x is 1/4 4 1/3 3 TRUE ANSWER : ? YOUR ANSWER : ?
A stone was thrown vertically upwards from the ground with a velocity of 50 m/sec. After 5 seconds another stone was thrown vertically upwards from the same place. If both the stones strike the ground at the same time, then the velocity with which the second stone was thrown should be (Assume g = 10 m/sec²) 40 m/sec 25 m/sec 15 m/sec 50 m/sec TRUE ANSWER : ? YOUR ANSWER : ?
A solid sphere of mass M and radius R rolls down a plane inclined at 0 with the horizontal. The acceleration of sphere is (where g is acceleration due to gravity) (1/3) g sin0 (5/7) g sin0 (3/7) g sin 0 (2/5) g sin 0 TRUE ANSWER : ? YOUR ANSWER : ?
A square hole is punched out of a circular lamina, the diagonal of the square being the radius of the circle. If ‘r’ is the radius of the circle, the C.G. of the remainder from the corner of the square on the circumference will be [r (π - 0.5)]/(π + 0.25) [r (π + 0.25)]/(π - 0.5) [r (π - 0.25)]/(π - 0.5) [r (π + 0.25)]/(π + 0.5) TRUE ANSWER : ? YOUR ANSWER : ?
If two forces P and Q (P > Q) act on the same straight line but in opposite direction, their resultant, is P - Q P/Q P + Q Q/P TRUE ANSWER : ? YOUR ANSWER : ?
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 1.0 m/sec 1.5 m/sec 0.5 m/sec 2.5 m/sec TRUE ANSWER : ? YOUR ANSWER : ?
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 0.7 m/sec² 0.5 m/sec² 1 m/sec² 1 cm/sec² TRUE ANSWER : ? YOUR ANSWER : ?