Momentum and Collisions - Mission MC2 Detailed Help

A 2.0-kg object moving at 5.0 m/s encounters a 30-Newton resistive force over a duration of 0.10 seconds. The impulse (magnitude only) experienced by this object is approximately ____ N•s.

(Note: Numbers are randomized numbers and likely different from the numbers listed here.)

The impulse encountered by an object can be calculated from the force (F) that was exerted on it and the time (t) over which the force was exerted. The formula is 
Impulse = F • t

This question is quite simple if you approach it with a confident understanding of what impulse is and how to calculate it. On the other hand, if your grasp of impulse is weak or your confidence is low, you will become distracted by the amount of information provided in the question. In fact, you will likely make an effort to include mass and velocity information in your calculation despite their lack of importance to the question. Don't be fooled! Impulse is the product of force and time; if both quantities are known, the impulse can be calculated (see Formula Frenzy section).

Momentum Change - Impulse Theorem:
When a force is exerted upon an object in a collision, the object is said to have encountered an impulse. The impulse is simply the mathematical product of the force exerted on the object and the amount of time over which it was exerted. The impulse changes the object's momentum and is equal to the amount of momentum change.
Impulse = Momentum Change


Tired of Ads?
Go ad-free for 1 year