Basics to momentum
What is the momentum formula?
p=mv
How much momentum does a 3500 kg truck have when traveling 2.36 m/s?
8260 kgm/s
What are the two types of collisions?
elastic & inelastic
What is impulse?
The change in momentum
True or False: Momentum can be transferred from one object to another.
True
What are the units for each variable in the momentum formula?
p=kgm/s
m= kg
v= m/s
How much momentum does a 66.8 kg bike and rider have when traveling 23.5 m/s?
1569.8 kgm/s
What happens during an elastic collision?
Object bounce apart?
What is the formula for impulse?
impulse = F*t
F*delta t = m*delta v
A bowling ball has a momentum of 7kgm/s. It strikes a pin. What is the momentum of the pin?
7 kgm/s.
Rearrange the momentum formula for each variable?
m= p/v
v= p/m
100 m/s
What happens during an inelastic collision?
objects stick together
How much impulse is applied by a 25 N force in 30 seconds?
750 Ns
What has more momentum:
a. a tiny bullet moving at a fast speed
b. a tractor trailer filling up gas
bullet
Momentum is a (scalar / vector) quantity.
vector
If the momentum of a 165.3 kg speed skater is 2475 kgm/s, how fast is she traveling?
14.97 m/s
What is the formula for elastic and inelastic collisions?
elastic: m1v1=m2v2
inelastic: m1v1 + m2v2 = (m1+m2)v3
A truck with a mass of 4000 kg moves at 25 m/s. What is the braking force needed to bring the truck to a halt in 15 seconds?
6666.66 N
An astronaut holding a tool box filled with tools in space is slowly drifting away from the spaceship. What can the astronaut do to get back to the spaceship.
Throw the tools in the opposite direction
In order for an object to have momentum it must have a _____________.
velocity
What is the magnitude of the momentum of a 22.1 gram sparrow flying at a velocity of 8.6 m/s?
0.19 kgm/s
What type of collision is the following example:
The famous Newton's cradle consists of 5 hanging spheres of equal mass. The first ball hits the rest of the balls. When it hits, it stops, and one ball on the opposite side jumps away.
elastic
A 2000 kg car traveling at 18 m/s experiences a force of 2400 N to bring the car to rest. How much time does it take to bring the car to rest?
15 seconds
When tossing around the water balloons why did you want to carry through with your catch?
increasing the time of the catch decreased the force of the catch. Decreasing the possibility of the balloon to pop.