Units
Velocity is measured in _________
Meters/second (m/s)
Force x time is equal to ____
Impulse/Change in momentum/mass*change in velocity
A force acting for a period of time is known as ______
Impulse (J)
If you double the amount of force used to move an object, the impulse will be _____
Doubled
An object will only change its momentum due to __________
An external force
Momentum is measured in _______
Kilogram-meters/second
(kg*m/s)
The equation for ______ is
p_0=p_f
Law of Conservation of Momentum
Give an example of an object experiencing an impulse
-Bat hitting baseball
-Car hitting a tree
-Object changing speed
If two objects have the same amount of mass, then the slower moving object has ____ momentum
Less
How does an airbag work to protect you in a car crash? (Be specific!)
Increases time of impact to decrease impact force
Impulse is measured in ______
Newton-second (Ns)
What name is associated with this equation?
Impulse = Change in Momentum
Impulse-Momentum Theorem
In a(n) ____ collision, the objects will stick together and move with the same velocity
Two identical eggs are launched the same speed at a pillow and a car. Which egg experienced a larger change in momentum?
They experience the same change
Name some of the sources of energy loss associated with an inelastic collision
What units make up a Newton?
kg*m/s^2
Express the momentum of an object moving in the xz plane in unit vector (i-j-k) notation
vec p =p_x hat i +p_z hat k
An elastic collision differs from an inelastic collision because for inelastic collisions, _______ is not conserved
Kinetic Energy
Two bullets are fired at two pineapples. One bullet becomes embedded and moves together with the pineapple, the other passes through its pineapple. Which bullet moves faster after the collision
Bullet #2 (passes through)
A dog moves from the back of a boat to the front. How, if at all, does the center of mass of the dog-boat system change as the dog moves?
Does not change
What is this unit equivalent to in terms of fundamental units? (kg, m, s)
N/J
1/m
What is the equation for finding an object's center of mass?
(summ_ix_i)/(summ_i)
DAILY DOUBLE
What does Heisenberg's Uncertainty Principle say?
The product of the uncertainty in the momentum and the uncertainty in the position is always
> h/(4pi)
Car 1 has a mass of 1.5m and is moving at 2v to the right. Car 2 has a mass of 0.75m and is moving at 3v to the left. In what direction will both cars move after the collision?
To the right
DAILY DOUBLE
If an object explodes into three equal parts, what will be the angle between each parts velocity?
120 degrees