Question
Is mechanical energy always conserved?
✓
Answer
No, only in isolated system whereas internal non-conservative force is zero.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
A truck and a car are moving with the same kinetic energy on a straight road. Their engines are simultaneously switched off. Which one will stop at a lesser distance?
If the sum of all the forces acting on a body is zero, is it necessarily in equilibrium? If the sum of all the forces on a particle is zero, is it necessarily in equilibrium?
Can Earth be regarded as a 'point object' if only the orbital motion of Earth around the sun is considered?
Which harmonics are absent in a closed organ pipe?
Why does the time period of a swing not change when two persons sit on it instead of one?
Why do liquids rise in a capillary tube?
Given below are some functions of x and t to represent the displacement of an elastic wave.
$\text{y}=4\sin(5\text{x}-\text{t/ 2})+3\cos(5\text{x}-\text{t/ 2})$
→$\text{y}=4\sin(5\text{x}-\text{t/ 2})+3\cos(5\text{x}-\text{t/ 2})$
State the number of significant figures in the following: 6.320 J
The stress versus strain graphs for two materials $A$ and $B$ are shown below: $($The graphs are to the same scale$)$.
→
- Which material has greater Young's modulus?
- Which material is more ductile?
- Which is more brittle?
Read each statement below carefully and state with reasons, if it is true or false: Three vectors not lying in a plane can never add up to give a null vector.