Question

The kinetic energy of a particle continuously increase with time. Then
a .resultant force on the particle must be parallel to velocity at all instants
b. resultant force on the particle must be at an angle less than 90 at all times
c. its height above ground level must continuously decrease
d. magnitude of linear momentum continuously increases

Answer 1

Answer:

The answer must be option (b)

Explanation:

As if the force is at an angle beyond 90 degree then the force will act to slow down the object but as the kinetic energy is increasing, it means the velocity is increasing because mass is const. So the answer must be option (b)

Answer 2

Answer:

answer is B

Explanation:

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