Is it true that the following statements are correct?

Statement1: The kinetic energy of an object becomes one-third if the speed becomes half.

Statement2: When any object is raised above ground its energy decreases.

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

True

False

answer is B.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

The above statements are False.

K . E . = \frac{1}{2} m v^{2}

m

and

v

represents mass and velocity of an object respectively.
If speed is half, kinetic energy will of an object will be one-fourth.

P . E . = mgh

g

and

h

represents acceleration due to gravity and height of an object respectively.
If any object is raised above the ground, the potential energy, will increase, and total energy will also increase.
When work is performed on a system, its total energy (kinetic and potential) rises; conversely, it falls when the system performs work. So both statements are incorrect.

Watch 3-min video & get full concept clarity