Chapter 4A, Problem 1PLA

These pictures show a cart that is moving at constant velocity.

1. (a)
2. (b)
3. (c)
4. (d)

The carts pictured above are all moving in a straight line to the right. The pictures were taken 1.00 s apart.

To determine

The cart that is moving at constant velocity.

Answer to Problem 1PLA

Option (b).

Explanation of Solution

Velocity is the rate of change in the position of the object. Therefore, at constant velocity, the change in the position of the object must be same for a given time.

Conclusion:

1. (a) The space between the carts are not equally space, therefore it does not have constant velocity. Option (a) is incorrect.
2. (b) The distance covered by the cart in $1.00\text{ s}$ is the same as the space between the carts are the same. Option (b) is correct.
3. (c) The space between the carts are not equally space, therefore it does not have constant velocity. Option (c) is incorrect.
4. (d) The space between the carts are not equally space, therefore it does not have constant velocity. Option (d) is incorrect.

Therefore, option (b) is moving at constant velocity.