Momentum
What is the formula for calculating momentum?
P=mv
What is the definition of the law of conservation of momentum?
total momentum before a collision is the same as afterwards
Filling a balloon with air and the letting it go is an example of which law?
What is the unit for mass?
kg (kilograms)
What is the units for velocity
meters per second or m/s
Superman at rest in space throws a more massive asteroid. Which moves faster?
Superman
When a bat hits a ball, the change in momentum of the bat _________________________the change in momentum of the ball.
equals
The greater the mass or acceleration of an object, the greater the force it will have as it collides with another object.
2nd Law
What is the unit for momentum?
kg * m/s (kilograms, meters per second)
A 2 kg mass traveling at 9 m/s strikes another mass. The second mass then travels 100 m/s. What is the second mass?
.18 kg
After a firecracker falling through the air explodes, the net momentum of its fragments
remains the same
A 4kg cat moving at 3 m/s hits a 6 kg cat moving at 2 m/s, they stick together, as cats do. What is their total momentum?
0 kg m/s
____________ forces do not affect the movement of an object.
Balanced
When the speed of an object is doubled, its momentum
doubles
What are the appropriate units to describe acceleration?
meters per second squared
m/s2
An equal amount of momentum is given to a large ruck and a small car. Which one goes faster?
The car goes faster because it has less mass
Why are crumple zones in cars related to the concept of momentum conservation?
They extend the time of collision, reducing the force on passengers
A rocket launches because of
an opposite reaction
Two skaters begin at rest. Skater 1 has a smaller mass than Skater 2. After they push off each other......
Skater 1 will have a greater velocity due to their smaller mass
A runner has a momentum of 720 kg m/s and is traveling at a velocity of 5 m/s. What is his mass?
144 kg
What is the total momentum of two 70 kg skydivers falling together at 50 m/s?
7,000 kg* m/s
How does doubling an object's mass affect its momentum if its velocity stays the same?
The momentum doubles
Which of Newton's Laws of Motion would apply to a roller coaster?
All of them