Question

How long would a -100N force need to be applied to a 200kg object moving 50m/s to stop the object?

a) The object will never stop.
b) 20 seconds
c) 10 seconds
d) 5 seconds

Answer 1

To stop the object, a -100N force needs to be applied for 5 seconds.

So, the correct answer is option D.

Step-by-step explanation:

To calculate the time it takes to stop an object, we can use the formula:

Force = mass * acceleration

First, we need to find the acceleration of the object. Using the formula:

Acceleration = change in velocity / time

We know that the force applied is -100N, the mass is 200kg, and the initial velocity is 50m/s. Rearranging the formula, we can solve for time:

Time = change in velocity / (Force / mass)

Substituting the values, we get:

Time = 0 - 50 / (-100 / 200) = 5 seconds

Therefore, the correct answer is option d) 5 seconds.