3.5.2 Impulse

• Impulse is the change in momentum of an object when a force acts on it over a period of time.
• What are the factors affecting impulse?

  Force and duration
• What are the units of impulse?

  $Ns$ or $kg m / s$
• A 2 kg ball is struck with a force of 10 N for 0.5 seconds. Its initial velocity is 0 m/s. Its final velocity is 2.5 m/s.
• The impulse is the change in momentum of an object when a force acts on it over a period of time.
• Match the variable with its unit:

  Change in momentum ↔️ kg m/s

  Time interval ↔️ s
• The impulse equals the change in momentum.


  True
• Match the feature with its description:

  Impulse ↔️ Change in momentum

  Momentum ↔️ Mass in motion
• Impulse is dependent on time, while force is not.


  True
• An object struck with a force of 10 N for 0.5 seconds generates an impulse of 5 Ns.
• The impulse is the change in momentum of an object when a force acts on it over a period of time.
• What is the unit for force in the impulse formula?

  Newtons (N)
• The impulse-momentum theorem can be mathematically expressed as $F \Delta t =$$\Delta p$.


  True
• What is the unit for the time interval in the impulse formula?

  Seconds (s)
• In an example problem, a 2 kg ball is struck with a force of 10 N for 0.5 seconds. What is the impulse on the ball?

  5 Ns
• What is the formula for impulse in terms of force and time interval?

  Impulse = F \Delta t</latex>
• What does v_{2}</latex> represent in the impulse formula?

  Final velocity
• The average force applied in the impulse formula is measured in Newtons
• A 2 kg ball is struck with a force of 10 N for 0.5 seconds. The initial velocity is 0 m/s. The change in momentum is 5
• What is the relationship between impulse and change in momentum?

  $Impulse =$$\Delta p$
• The impulse formula can be used to calculate the final velocity of an object if all other variables are known.


  True
• What is the unit for impulse in the SI system?

  Ns
• Impulse is the change in momentum of an object.


  True
• A 2 kg ball is struck with a force of 10 N for 0.5 seconds. The initial velocity is 0 m/s. What is the final velocity of the ball?

  2.5 m/s
• Impulse is the change in momentum of an object.


  True
• What is the unit for time in the impulse formula?

  Seconds (s)
• The formula for impulse is F \Delta t
• The impulse formula is \text{Impulse} = F \Delta t
• Steps to calculate impulse and final velocity:

  1️⃣ Calculate impulse using $F \Delta t$

  2️⃣ Calculate change in momentum $\Delta p$

  3️⃣ Use $mv_{2} - mv_{1}$ to find final velocity
• The impulse-momentum theorem is mathematically represented as F \Delta t = \Delta p
• What is the primary use of the impulse formula?

  Calculate change in momentum
• A 2 kg ball is struck with a force of 10 N for 0.5 seconds. Calculate the final velocity.

  2.5 m/s
• Match the variable with its symbol:

  Average Force ↔️ F

  Time Interval ↔️ \(\Delta t\)

  Change in Momentum ↔️ \(\Delta p\)

  Mass ↔️ m
• Steps to calculate impulse and final velocity using the impulse formula:

  1️⃣ Identify the known variables

  2️⃣ Plug the known values into the impulse formula

  3️⃣ Solve for the final velocity
• What is the final velocity of a 2 kg ball struck with a force of 10 N for 0.5 seconds if its initial velocity is 0 m/s?

  2.5 m/s
• In inelastic collisions, kinetic energy is conserved.

  False
• Match the feature with the correct concept:

  Impulse ↔️ Change in momentum

  Force ↔️ Average force acting
• What is the formula for impulse?

  Impulse = F \Delta t</latex>
• In the impulse formula, what does $\Delta p$ represent?


  Change in momentum
• A 2 kg ball, initially at rest, is struck with a force of 10 N for 0.5 seconds. What is its final momentum?

  $5 kg m / s$