State which of the following situations are possible and
n example for each of these:
a) an object with a constant acceleration but with zero ve
an object moving with an acceleration but with
speed.
an obiect moving in a certain direction w
acceleration in the perpendicular direction.
Answers
Answer:
Explanation:
1) an object with a constant acceleration but with zero ve
The term acceleration implies that the velocity of the object is changing. The vertical projection of particle is one example. When an object is thrown in upward direction, at the maximum height the velocity of the object becomes zero but still in that condition a constant acceleration due to gravity is working.
2) an object moving with an acceleration but with speed
acceleration is rate of change of velocity. Velocity includes both speed and direction so if either (or both) change, this is a change in velocity. So clearly, the direction can change and the speed remain the same and this would result in an acceleration. Circular motion is a good example of this.
3)an object moving in a certain direction w ith acceleration in the perpendicular direction.
Object moving in a certain direction with an acceleration in perpendicular direction is possible; in case of circular motion. When an object moves on a circular path, its direction is along the tangent of the circle but the centripetal acceleration is towards the radius of the circle. We know, that a tangent always makes a right angle with the radius; so when an object is in circular motion, the acceleration and velocity are in mutually perpendicular direction.