Impulse-Momentum Theorem
Calculating Linear Momentum
Problems using I-M Theorem
Momentum & Energy
Momentum & Graphs
100
Expressed using the formula F*Δt
What is impulse?
100
Calculate the momentum of 14 kg sloth moving at a velocity of 2.0 m/s to the right.
What is 28 kg m/s to the right?
100
A 35 m tall statue has a mass of 1.00 x 10^6 kg. If the statue is to be moved, calculate the magnitude of the impulse that must act in order for the speed to increase from 0.0 m/s to 0.20 m/s.
What is 200,000 kg m/s?
100
Momentum is a vector/scalar quantity?
What is vector?
100
http://www.webassign.net/userimages/bonham@wku/realtime/realtimephysics_8_HW_1.gif Determine the Impulse from the graph.
What is 12 kg m/s?
200
The units for momentum and impulse
What is kg m/s?
200
Calculate the velocity of 10 kg koala bear that has a momentum of 45 kg m/s to the right.
What is 4.5 m/s to the right?
200
A 35 m tall statue has a mass of 1.00 x 10^6 kg. If the statue is to be moved by a 12.5 kN force from a speed of 0.0 m/s to 0.20 m/s, calculate the time it will take.
What is 16 seconds?
200
Momentum/Energy is proportional to the square of velocity.
What is Energy?
200
http://physicsnet.co.uk/wp-content/uploads/2010/05/force-time-graph1.jpg Calculate the change in momentum.
What is 2000 kg m/s?
300
Impulse is mathematically equivalent to this physical quantity.
What is the change in momentum.
300
A roller-skater skates at a speed of 40.3 km/h. If the skater's momentum is 660 kg m/s, calculate his mass.
What is 59 kg?
300
An armoured car has a mass of 6.0 x 10^3 kg. Suppose this car is accelerated from rest by a force of 8.0 kN to the east. Find the car's velocity after 8.0 seconds.
What is 11 m/s?
300
Compare the fundamental units of energy and momentum. Determine the difference.
Energy is multiplied by an extra factor of m/s.
300
http://img.sparknotes.com/content/testprep/bookimgs/sat2/physics/0007/Fvst.gif Find the change in momentum.
What is 12 kg m/s?
400
Two cops jump out a ten-story building. One lands on a bush and another lands on the concrete. Which is more likely to survive and why?
The one landing in the bush. Same change in momentum, but longer impact time means less force. https://www.youtube.com/watch?v=4YqoI84-9vA
400
How much does an antelope weigh if it has a momentum of 450 kg m/s when it is traveling 15 m/s.
What is 294 N?
400
In order for a 45 kg person to leave as a human cannonball from a cannon, a 1600 N force must be exerted on the person for 0.68 seconds. Find the speed with which they leave the cannon.
What is 24 m/s?
400
Two different arrows are shot. Arrow 1: m = 2 kg, v = 10 m/s Arrow 2: m = 1 kg, v = 20 m/s Compare momentum and KE.
Momentum is the same. Arrow 2 has a greater KE.
400
http://www.webassign.net/sercp/p6-12.gif If a moving object of 2 kg moves with a speed of 4 m/s when it undergoes the force in the graph (in the same direction as the original velocity), determine the new total momentum.
What is 20 kg m/s?
500
Provide an practical example of the impulse-momentum theorem that we have not covered in class.
Answers may vary.
500
In 1994, a tower 22.13 m tall was built out of LEGO blocks. Suppose a 2.00 g block is dropped from the top of the tower. Neglecting air resistance, calculate the block's momentum at the instant the block hits the ground.
What is 0.417 kg m/s downwards?
500
A giant earthworm is 12.0 kg. Suppose one is picked up by an eagle, and is dropped from a heigh of 40.0 m. By skillfully using its muscles, the earthworm manages to extend the time during which it collides with the ground to 0.250 s. Find the net force that acts on the earthworm.
What is 1344 N?
500
Momentum can be found from area under a ______________ graph.
What is Force vs. Time graph?
500
http://www.physicstutorials.org/images/stories/eample46.png Find the change in momentum.
What is 19 kg m/s?
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