Question

A constant force is acting perpendicular to the velocity ofa particle. For this situation, which one of the following is correct?
a.velocity is constant
b.acceleration is constant
c.momentum is constant
d.it will flow in elliptical path
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Answer 1

Answer:

acceleration is constant

Since the force acts perpendicular to the velocity of the particle,acceleration will always be force per unit mass.So accelearation will remain constant for such a situation.Also the velocity in the direction of force is changing so momentum cannot be constant.

Also the particle's velocity will be either constantly increasing or decreasing thereby giving a constantly increasing or decreasing angle between the horizontal and perpendicular velocity.So it could not follow an elliptical path.

Answer 2

Answer:

b.acceleration is constant

Explanation:

Since the force acts perpendicular to the velocity of the particle,acceleration will always be force per unit mass.So accelearation will remain constant for such a situation.Also the velocity in the direction of force is changing so momentum cannot be constant.

Also the particle's velocity will be either constantly increasing or decreasing thereby giving a constantly increasing or decreasing angle between the horizontal and perpendicular velocity.So it could not follow an elliptical path...