Question

A ball is rolling down a slope at a steady speed. Which of the following statements is correct ? [1] (a) Frictional force is greater than the forward force. (b) There is an unbalanced force downwards. (c) There are no forces acting on the ball. (d) The forces acting on the ball are balanced.

Answer 1

Answer:

the forces acting on the ball are balanced.

Since speed is steady, there is no acceleration.

so, all forces are to be balanced

Answer 2

Option (D)

Explanation:

In the given condition, there are two types of force acting on the ball that is rolling down at a constant speed. They are-

• The frictional force- a force that occurs due to the contact or sliding of the two surfaces over one another.

• The forward force- this force is generated due to the movement of an object in the forward direction due to its weight.

When these two types of forces are acting equally on the sliding object, then the object (a ball) moves at a steady speed.

Thus, the correct answer is option (D), as both the forces acting on the object are balanced by one another. Or it can be said that the resultant force is zero.

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