Momentum etc Flashcards
Collision where objects rebound creates a ____ change in impulse
greater. (change in momentum) must turn it around to send it back the way it came
Object collides with stationary object, impulse they feel is (greater/equal/less) between the two
equal and opposite
How much work does the tension of string do on a block of wood?
- 90 degree difference at all points
Bullet hits block on string, oscillates. Energy/momentum/both conserved?
Only energy due to external force that gravity has on the system
Moment of inertia, I, is proportional to radius in what way
r^2
Launching a rocket which East or west or straight up would be best?
East, because earth spins W–>E, so launching it east means you can capitalize on E’s spin to contribute to escape velocity
Delta height is proportional to
vmax^2
U is proportional (relating to radius)
1/r
When calculating time of flight, you need (x/y direction) information
Y direction
Free fall is 1s, ___m
5m
30 degree angle, the max height will be ___times the range
7x
At the apex, the speed and velocity of a projectile (are/aren’t) zero
Aren’t. The y-component of velocity is zero, but it still has speed in the x-direction
In uniformly accelerated motion, position relates to (with reference to time)
t^2, generates parabolic graph
Uniformly accelerated motion does not depend on
mass
Free fall time eqn
delta y= 1/2 gt^2
