Question

Kinetic energy of a particle moving on a straight line is given by K=at³ where a is some positive constant. The force acting on the particle is(if particle starts from rest)
1. Constant
2. Decreasing continuosly
3. Increasing continuosly
4. First increase then decrease​

Answer 1

Answer:

Kinetic energy     K=as2

Force acting on the particle     F=dsdK

∴    F=dsd(as2)

⟹    F=2as

this is the example I found on internet

Answer 2

Answer:

No. particles of solid doesn't move continuously.

Because in solid, malecules are tightly packed.Particles are attracted each other . So they have definite shape.

Where as in liquid and gases gap is more between the Particles.

Comparing to liquid , gases have more distance.

So ,there will be different shape for liquid. Where as in gases it moves continuouly, Particles are not attracted .There will be more gap for each particle

I hope it helps you

tq