Question

Susan goes out to exercise. She runs for one hour at a constant speed and velocity. What is the overall net force acting on Susan?

Answer 1

Answer:

susan is moving with constant velocity, so both the direction and magnitude of the velocity remains the same. so the accerlation of susan=0. this is because an object gets accerlerated when either the magnitude or direction of the spped changes

Explanation:

Answer 2

Question:

Susan goes out to exercise. She runs for one hour at a constant speed and velocity. What is the overall net force acting on Susan?

A) The net force acting on the runner must be zero. Eliminate

B) The net force depends on the pull of gravity on the runner.

C) The net force acting on the object is pushing in the same direction the object is traveling.

D) The net force acting on the object is pushing in the opposite direction the object is traveling.

Answer:

A) The net force acting on the runner must be zero. Eliminate is the correct answer.

Explanation:

1. As said in question Susan is having constant velocity which means the direction and velocity will remain same.

2. As there is constant velocity , acceleration will also be zero.

3. How an object gets accelerated?

An object gets accelerated when there is a change in magnitude or when the direction of speed changes.

If we apply formula of force now,

F = ma

F = Force

m = Mass of object

a = acceleration of object = 0

F = m * 0

F = 0

So, the net force on object will be zero.