alleryStart learning →Newton's second law can be stated using momentum. The resultant force on an object is equal to what?
AThe total momentum of the body
BThe rate of change of momentum
CThe product of mass and speed
DThe area under a speed graph
Answer & Solution
Correct answer: B. The rate of change of momentum
1. A force changes the motion of an object, so it changes the momentum of that object.
2. Stated in its most general form, the resultant force equals the rate of change of momentum.
3. Rate of change means how much the momentum changes in each second.
4. The total momentum itself is not the force, it is the quantity the force is changing.
_Source: Siyavula Physical Sciences Grade 12 (Everything Science, CC BY 4.0), Chapter 2: Momentum and impulse_
Keep practising Momentum and Impulse
Browse all Momentum and Impulse questions for NSC / Matric, or explore more Physics topics.
Related questions
Pick the bigger momentumWhy do car makers design the front of a car to crumple rather than to bounce back in a heaWhich statement correctly compares an elastic collision with an inelastic collision?Under what condition does the total momentum of a system of interacting objects stay constWhy does the momentum of a moving object always point in the same direction as its velocitMass in motion is another way of describing which physical quantity?