Impulse

Front

What is impulse?

Back

Impulse is the change in momentum of an object when a force is applied over a period of time. It is calculated as the product of the average force (F) and the time duration (Δt) during which the force acts. Impulse = F × Δt.

Front

What is the relationship between impulse and momentum?

Back

Impulse is equal to the change in momentum of an object. Mathematically, Impulse = Δp = p_final - p_initial, where p is momentum.

Front

How is impulse calculated?

Back

Impulse can be calculated using the formula: Impulse = F × Δt, where F is the average force applied and Δt is the time duration.

Front

What are the units of impulse?

Back

The SI unit of impulse is Newton-seconds (N•s) or kg•m/s.

Front

What does a positive impulse indicate?

Back

A positive impulse indicates that the momentum of the object is increasing in the positive direction (rightward).

Front

What does a negative impulse indicate?

Back

A negative impulse indicates that the momentum of the object is decreasing or changing in the negative direction (leftward).

Front

If a force of +6 N is applied for 4 seconds, what is the impulse?

Back

Impulse = F × Δt = +6 N × 4 s = +24 N•s.

Front

If a force of -2 N is applied for 3 seconds, what is the impulse?

Back

Impulse = F × Δt = -2 N × 3 s = -6 N•s.

Front

What is the impulse experienced by an object if its momentum changes from 10 kg•m/s to 4 kg•m/s?

Back

Impulse = Δp = p_final - p_initial = 4 kg•m/s - 10 kg•m/s = -6 kg•m/s.

Front

What is the principle of conservation of momentum?

Back

The principle of conservation of momentum states that in a closed system, the total momentum before an event (like a collision) is equal to the total momentum after the event, provided no external forces act on it.