Answer the following questions for projectile motion on level ground assuming negligible air resistance (the initial angle being neither 0º nor 90º): (a) Is the acceleration ever zero? (b) Is the acceleration ever in the same direction as a component of velocity? (c) Is the acceleration ever opposite in direction to a component of velocity?

ANSWER:

Introduction:-The projectile is thrown at some arbitrary angle .The initial velocity let’s say .It’s horizontal and vertical components are and respectively.There is only one force which is the force of gravity acting downwards. Therefore the acceleration is towards downwards and has no horizontal component.a)

The acceleration is always there because of the force of gravity. So, there is no such time when...