Question:
Lenz’s Law is a consequence of law of conservation of
Energy only.
Charge only.
Momentum only.
Energy and momentum.
Question:
Two blocks A lying on a friction less table are connected by a light string. The system is pulled horizontally with an acceleration of by a force F on B. The tension in the string is
Question:
A body of mass 2kg collides with a wall with a speed of and rebounds with the same speed. If the time of contact is, the force exerted on the wall s
Question:
The mechanical advantage of a system of pulley is four. The force needed to lift a mass of will be
Question:
The distance covered in time by a body having initial velocity and having constant acceleration a is given by. This result follows from
Newton’s First Law
Newton’s Second Law
Newton’s Third Law
None of the above
Question:
A plumb bob is hanging from the ceiling of a car. If the car moves with the acceleration ‘a’ the angle made by the string with the vertical is
Question:
A weight can be just supported on a rough inclined plane by a force either acting along the plane or horizontally. If is the angle of friction, then is