Kaplan Nursing Entrance Practice Exam

A force of 15,000 N is applied for one minute. What is the impulse applied to the object?

1. 900 N s

2. 900,000 N s

3. 15,000 N s

4. 1,500 N s

The correct answer is: 900,000 N s

Impulse is defined as the product of the average force applied to an object and the time duration over which that force is applied. The formula for calculating impulse (J) can be expressed as: \[ J = F \times t \] Where: - \( J \) is the impulse - \( F \) is the average force - \( t \) is the time duration in seconds In this case, a force of \( 15,000 \, N \) is applied for \( 1 \, minute \). To use the formula, it’s important to convert the time from minutes to seconds since the standard unit of time in physics calculations is seconds. One minute is equal to 60 seconds. Now, substituting the values into the impulse formula, we have: \[ J = 15,000 \, N \times 60 \, s = 900,000 \, N \cdot s \] This calculation shows that the impulse applied to the object is \( 900,000 \, N \cdot s \), which corresponds to the correct answer. Understanding impulse is crucial in physics, particularly in mechanics, as it relates to the change in momentum of an object. The longer the duration a