impulse n .pptx

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1. Impulse JEYMAR A. PAYUMO

2. We can apply an Impulse! Impulse is the force acting on an object and the time interval the force is exerted. Impulse is a vector quantity.

3. Impulse Calculations Impulse is calculated by the following equation I = F • t I = Impulse (N•s) F = force (N) t = time (s)

4. Impulse Since impulse depends on both force and time, there is more than one way to apply a large impulse on an object. To increase the magnitude of an impulse... You can increase the force applied You can increase the length of time the force is being applied

5. Impulse Example Continued The bedsheet had some ‘give’ to it. Thus, increasing the contact time and distance and reducing the overall average force exerted on the egg. The force of the egg is spread over the entire bedsheet and not just one specific point. This is the same idea as airbags

6. Impulse in Volleyball How can you improve your spike? Improve your impulse! Go to the gym to build up strength - this increases your force Follow through your hit - this increases your contact time with the ball Increase force + increase time = increase in impulse

7. Impulse Calculations Impulse is also defined as the change in an object’s momentum. Therefore, it can also be calculated according to any of the following equations. I = F• t I = ∆ P I = m ∆v I = m (v 2 - v 1 )

8. Impulse Calculations - Beginner A force of 13N is applied to an object for 35s. What is the impulse acting on the object?

9. Impulse Calculations - Intermediate An object has a momentum of 1000 kg•m/s. What is the impulse acting on the object in order for it to stop moving? What force is needed to stop in 1 second? In 2 seconds?

10. Impulse Calculations - Advanced How many seconds would a force of 9.00 N have to act on a 3.00 kg mass in order to change its velocity from 4 m/s to 8 m/s?

11. Impulse Calculations - Advanced A 3.00 kg ball moving with an initial velocity of +4.00 m/s is acted upon by a constant force F, for a period of 5.00 seconds. After the interaction, the ball is moving with a velocity of – 6.00 m/s. Find F.

12. Momentum and Impulse Recap When an unbalanced force acts on an object it will accelerate A.k.a. it will change velocity - either speed up or slow down When an object’s velocity changes, so does its momentum. P = m• v When something exerts a force on you, it exerts an impulse I = F •t Impulse changes Momentum and is also defined as I = ∆P

13. Impulse Example https://www.youtube.com/watch?v=K0ra7479zBs

14. Egg Drop Instructions Find a group of 2 or 3. Create your own contraption to reduce the force of an impulse by increasing the time of that impulse. - The egg will be inserted into the contraption at the end and must be able to be taken out after the drop to be inspected. Answer the questions on the handout. Prepare for the drop zone.