Back to WORK-ENERGY-POWER
NEET UG PHYSICS MCQ: WORK-ENERGY-POWER
1
Medium
1 of 1
Understanding
+4 | -1
You accidentally bump into a bookcase. It tilts briefly but then returns to upright, and you breathe a sigh of relief. When you first bumped the bookcase, its center of gravity moved
View answer and explanation
Correct option: A
Upward and its gravitational potential energy increased.
The correct answer is A. When the bookcase tilts, its center of gravity rises, increasing its gravitational potential energy, which then causes it to return to its upright position.
More Questions from WORK-ENERGY-POWER
Practice All Chapter MCQs →
ball is dropped on the ground from a height of . If the coefficient of restitution is 0.6 , the height to which the ball will rebound is
A running man has the same kinetic energy as that of a boy of half his mass. The man speed up by and the boy changes his speed by , so that the kinetic energies of the boy and the man are again equal. Then x in is
A force (where K is a positive constant) acts on a particle moving in the x-y plane. Starting from the origin, the particle is taken along the positive x-axis to the point (a,0) and then parallel to the y-axis to the (a,a). The total work done by the force on the particle is
A motor is used to deliver water at a certain rate from a given pipe. To obtain 3 times water from same pipe in same time, by what factor should power of the motor be increased.
A body projected vertically from the earth reaches a height equal to earth’s radius before returning to the earth. The power exerted by the gravitational force is greatest
The speed limit of a car over a roadways bridge in the form of a vertical arc is . The diameter of the are is
