Question

Which of the following objects has zero acceleration?

a) A car moving around a curve at a constant speed
b) An elevator moving upward with increasing speed
c) A ball rolling down an inclined plane
d) A book resting on a table

Answer 1

An object with zero acceleration is either at rest or moving at a constant velocity. In this case, a book resting on a table has zero acceleration.

Step-by-step explanation:

An object with zero acceleration means that it is either at rest or moving at a constant velocity. In this case, the correct option is d) A book resting on a table.

When an object is at rest, its velocity is zero, and therefore its acceleration is also zero. This is because acceleration is the rate at which the velocity of an object changes over time. If the velocity is constant (zero in this case), there is no change in velocity, so the acceleration is zero.

Similarly, if an object is moving at a constant velocity, it means its speed and direction are not changing. Since there is no change in velocity, the acceleration is also zero. This applies to the book resting on a table, as there is no motion or change in its velocity.