Question : Which of the statements is not correct regarding energy?
Option 1: The energy possessed by a body due to its change in position or shape is called potential energy.
Option 2: An object of mass m moving with velocity v has a kinetic energy of (mv)/2.
Option 3: The gravitational potential energy of an object of mass, M raised through a height, H from the Earth's surface is given by MgH.
Option 4: An object in motion possesses what is known as the kinetic energy of the object.
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Correct Answer: An object of mass m moving with velocity v has a kinetic energy of (mv)/2.
Solution : The correct option is an object of mass m moving with velocity v has a kinetic energy of (mv)/2.
The incorrect statement asserts that the kinetic energy of an object with mass "m" and velocity "v" is (mv)/2. However, the accurate formula for kinetic energy is 1/2(mv2), emphasising the squared velocity term. The correct expression reflects the kinetic energy's dependence on the square of the object's velocity.
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Question : Kinetic energy depends on:
Option 1: the velocity or speed of the moving body
Option 2: the mass of the moving body
Option 3: the pressure of the moving body
Option 4: both mass and velocity of the moving body
Question : In a water-lifting electric pump, we convert
Option 1: electrical energy into potential energy
Option 2: kinetic energy into electrical energy
Option 3: kinetic energy into potential energy
Option 4: electrical energy into kinetic energy
Question : In which form is the supplied heat energy stored during change in temperature of substance?
Option 1: Heat energy
Option 2: Kinetic energy
Option 3: Potential energy
Option 4: Both kinetic and potential energy
Question : The work done by the string of a simple pendulum during one complete oscillation is equal to
Option 1: The total energy of a pendulum
Option 2: Kinetic energy of the pendulum
Option 3: Potential energy of the pendulum
Option 4: Zero
Question : During ______ motion of an object along a straight line, the change in velocity of the object for any time interval is zero.
Option 1: Linear
Option 2: Translational
Option 3: Equilibrium
Option 4: Uniform
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