p=mv
Impulse
Elastic Collisions
Inelastic Collisions
Random
100
=mv
What is the equation for momentum?
100
A change in momentum
What is Impulse?
100
An elastic collision
What is when two objects collide and bounce off each other?
100
When two objects collide and stick together as one object after the collision
What is an inelastic collision?
100
The momentum before a crash is the same as the momentum after a crash.
What is the conservation of momentum?
200
A 60-kg halfback moving eastward at 9 m/s.
What is:
p = m*v = 60 kg*9 m/s
p = 540 kg•m/s, east
200
A Force x time
What is Impluse
200
Two bumper cars head towards each other and experience an elastic collision. Car 1 has a mass of 500 kg and Car 2 has a mass of 650 kg. Car 1 has an initial velocity 5 m/s and Car 2 had an initial velocity of -3 m/s. Car 2 had a final velocity of 2 m/s. What is the final velocity of Car 1?
What is :
200
Determine the post-collision velocity of the mitt and ball.
0.15 kg • v + 0.25 kg • v = 6.75 POM
0.40 kg • v = 6.75 POM
v = 16.9 m/s
200
Newton's Second Law
What is F=ma?
300
A car possesses 20 000 units of momentum. What would be the car's new momentum if ...
a. its velocity was doubled.
b. its mass was doubled (by adding more passengers and a greater load)
What is:
A. p = 40 000 units (doubling the velocity will double the momentum)
B. p = 40 000 units (doubling the mass will double the momentum)
300
The change in momentum of of 1kg object with an initial velocity of 2 m/s and a final velocity of 7m/s.
What is 5 POM?
300
Two ice hockey players head towards each other and experience an elastic collision. Player 1 has a mass of 125 kg and Player 2 has a mass of 100 kg. Player 1 has an initial velocity 3 m/s and Player 2 had an initial velocity of -10 m/s. and a final velocity of -2 m/s. What is the final velocity of Player 1?
What is:
300
What is the final velocity of the ice skater?
What is:
60 • v + 15 • v = 300
75 • v = 300
v = 4 km/hr
300
What is the displacement of the cross-country team if they begin at the school, run 10 miles and finish back at the school?
What is:
The displacement of the runners is 0 miles. While they have covered a distance of 10 miles, they are not "out of place" or displaced. They finish where they started. Round-trip motions always have a displacement of 0.
400
Determine the momentum of a ...
1000-kg car moving northward at 20 m/s.
What is :
p = m*v = 1000 kg*20 m/s
p = 20 000 kg•m/s, north
400
The Force of an object with a change in momentum of 10 POM is 20 sec.
What is :
J = F x t
10 POM = F x 20sec
F = 0.5 N
400
Assuming that the collision between Train 112 and Train 214 is a perfect elastic collision, (no damage done to either train) Train 112 has an initial velocity of 19.7 m/s & a mass of 144,000 kg Train 214 has a mass of 108,000 kg and is at rest. Calculate the final velocity of Train 214 after the collision if Train 112 has a final velocity of 5 m/s.
What is:
400
v = 1.5 m/s
Solve using a table or by the following method: The amount of mass in motion is increased from 3m to 4m (3m + m); that is mass is increased by a factor of 4/3 (1.33). To conserve momentum, an increase in mass by a factor of 1.33 must be accompanied by a decrease in velocity by a factor of 1.33. Thus divide the original velocity of 2 m/s by 1.33.
Still another method:
3*m*2 = (3*m + m)*v
6*m = 4*m*v
(6*m) / (4*m) = v
400
An airplane accelerates down a runway at 3.20 m/s^2 for 32.8 s until is finally lifts off the ground. Determine the distance traveled before takeoff.
What is:
500
According to the Guinness Book of World Records, the fastest recorded baseball pitch was delivered by Nolan Ryan in 1974. The pitch was clocked at 100.9 mi/hr (45.0 m/s). Determine the momentum of a 0.145-kg baseball.
What is:
p = m*v = 0.145 kg*45.0 m/s
p = 6.52 kg•m/s)
500
The Force required for a 50 kg object to accelerate from 25 m/s to 15 m/s in 5 seconds
What is:
500
Calculate the final velocities of each train if Train 214 [m= 108,000 kg] has an initial velocity of –13.4m/s , Train 112 [m=144,000 kg] has an initial velocity of 19.7 m/s final velocity of 5 m/s and the trains collide in an elastic collision.
What is:
500
How fast do the two trains cars coast after they have coupled together?
v = 3.3 m/s
Solve using a table or by the following method: The amount of mass in motion is increased from 5m to 6m (5m+m). That is, the total mass which is moving is increased by a factor of 6/5 (or 1.20). To conserve momentum, an increase in mass by a factor of 1.20 must be accompanied by a decrease in velocity by a factor of 1.20. Thus, divide the original velocity of 4 m/s by 1.2.
Still another method:
5*m*4 = (5*m + m)*v
20*m = 6*m*v
(20*m) / (6*m) = v
3.3 m/s = v
500
A measure of an objects inertia.
What is mass?