Question

A body moves with constant speed in a straight line. Which of the following statements must be true:
A. A constant net force acts on the body in the direction of motion
B. A single constant force acts on the body in the direction of motion
C. A single constant force acts on the body in the direction opposite to the motion
D. No Net force on the body​

Answer 1

The correct answer is option D. There is no net force acting on the body.

It is given that the body is moving in a straight line which means the body is moving in a particular direction. The initial velocity of the body will be equal to its final velocity which results in no change in acceleration since the body moves with a constant speed towards the same direction in a straight line.

Answer 2

Answer:

d) If a body moves with constant speed in a straight line, then-No Net force on the body​ and a net force of zero acts on the body.

Explanation:

• The cause of motion, according to Newton, is a force or a combination of forces acting on the object.
• A resultant force, sometimes known as a net force, can replace the actions of many forces.
• The First Law of motion states that if the net force on an object is zero the object will be moving with constant velocity or stay at rest.
• If the net force is greater than zero, the object will move at a faster rate. The Second Newton's Law is stated in this manner.