Question

When an object moves in a straight line, which statement is true? 1.When the object moves at a constant speed, the resultant force is zero 2.When the object accelerates, the resultant force is zero 3.When the object moves at a constant speed, the forward force is greater than the resistive force 4.The object requires a resultant force in order to move at constant speed

Answer 1

Answer:

If the resultant force on an object is zero, this means: ... a moving object continues to move at the same velocity (at the same speed and in the same direction)

Answer 2

Answer:

1. When the object moves at a constant speed, the resultant force is zero.

Explanation:

1. For any object to be affected by a force, it must be accelerated (as F = ma).

2. But in this case, there is a constant speed and velocity, which means that there will be no acceleration as there is no change in velocity (as acceleration is the rate of change of velocity).

3. So acceleration is zero and force is zero as F = m(0) = 0