Momentum and Impulse
This is the equation used to find momentum.
What is p=mv?
This is the product of the mass and velocity of an object. Sometimes known as a "quantity in motion"
What is momentum?
As a 1.0 kg mass falls freely to the Earth, its momentum
a) decreases
b) increases
c) remains the same
Two billiard balls colliding and bouncing away from each other is considered this type of collision.
What is elastic collision?
What is the mass of an eastern gray squirrel that has a momentum of 0.739 kg m/s when moving at a top speed of 5.6 m/s?
What is 0.13 kg?
The change in momentum is known as this term.
What is Impulse?
Which of the following objects has the greatest momentum?
a) a 1 kg object moving at 200 m/s
b) a 10 kg object moving at 30 m/s
c) a 20 kg object moving at 20 m/s
d) a 100 kg object moving at 2 m/s
What is
c) a 20 kg object moving at 20 m/s?
Two elks are traveling toward each other to commence battle. The first elk, mass=340 kg, is traveling at 19.1 m/s while the second smaller elk (320 kg) is traveling at -20.1 m/s. The two collide and their antlers become stuck.What type of collision would this be considered?
What is inelastic?
The impulse of an object which exerts a 45 N force over 30 seconds is this value.
What is 1350 kg m/s?
Objects stick together after meeting. Momentum is conserved but kinetic energy does not.
What is an inelastic collision?
A force of 20 newtons is exerted on a cart for 10 seconds. How long must a 50 newton force act to produce the same impulse?
a) 10 s
b) 2.0 s
c) 5.0 s
d) 4.0 s
d) 4.0 s
Two elks are traveling toward each other to commence battle. The first elk, mass=340 kg, is traveling at 19.1 m/s while the second smaller elk (320 kg) is traveling at -20.1 m/s. The two collide and their antlers become stuck. What will their final velocity be?
What is 0.094 m/s?
Which has more momentum:
a) a 650 kg brown bear moving at a speed of 7.3 m/s
or
b) a 250 kg tuna moving at a top speed of 19.4 m/s
What is b) a 250 kg tuna moving at a top speed of 19.4 m/s?
This is an important part of the law of conservation of momentum. No outside forces are acting on it.
What is a closed system or isolated system?
A 50 kg woman wearing a seat belt is traveling in a car that is moving with a velocity of 10 m/s. In an emergency, the car is brought to a stop in 0.50 second. What force does the seat belt exert on the woman so that she remains in her seat?
a)-1.0 x 103 N
b)-5.0 x 102 N
c)-5.0 x 101 N
d)-2.5 x 101 N
a)-1.0 x 103 N
A 1 gram dragonfly traveling at 7.8 m/s collides with a 2.5 g mosquito traveling at -0.25 m/s. After the collision, the mosquito’s velocity is 0.25 m/s. What is the velocity of the dragonfly after the collision?
What is 6.55 m/s?
Find the mass of an object which exerts a 45 N force over 30 seconds. During this time, the object has moved from rest to a final velocity of 18 m/s.
What is 75 kg?
Objects bounce off each other and both momentum and kinetic energy are conserved.
What is elastic collisions?
A 2.0 kg toy cannon is at rest on a frictionless surface. A remote triggering device causes a 0.005 kg projectile to be fired from the cannon. Which equation describes this system after the cannon is fired?
a)mass of cannon + mass of projectile=0
b) speed of cannon + speed of projectile=0
c) momentum of cannon + momentum of projectile=0
b) velocity of cannon + velocity of projectile=0
c) momentum of cannon + momentum of projectile=0
A 0.50 kg ball traveling at 6.0 m/s collides head-on with a 1.00 kg ball moving in the opposite direction at a velocity of -12.0 m/s. The 0.50 kg ball moves away at -14 m/s after the collision. Find the velocity of the second ball.
What is -2.0 m/s?