ch.6 physics

1kg chunk of putty moving at 1 m/s collides w and sticks to a 5kg bowling ball initally at rest the bowling ball and puuttythen move with a momentum of

1 kg m/s

A 2 kg rifle that is suspended by strings fires a .01 kg bullet at 200m/s. THe recoil Velocity of the rifle is about

1 m/s

a bungee jumper attains a speed of 30 m/s just as the bungee cord begins to strechis 2 s while coming to a halt the jumpers average deceleration is about

1.5 g

two identical glides slide toward eachother on an air track. one moves at 1 m/s and the other at 2 m/s they collide stick and moves at

1/2 m/s

consider massive gliders that slide friction free along a horizontal air track. glider a has a mass of 1 kg a speed of 1 m/s and collides with glider b that has amass of 5 kg and its at rest. if they stick upon collision their speed after collision will be

1/6 m/s

a 5000 kg freight car moving at 2m/s collides w a 10000 kg freight car at rest they couple upon collision and move away at

2 m/s

the speed of a 4kg ball witha momentum of 12 kg m/s

3 m/s

the change in momentum that occurs when a 1 kg bal traveling at 4 m/s strikes a wall and bounces back at2 m/s

6 kg m/s

a cannon recoils while firing a cannonball. the speed of the cannons recoil is relatively smal because

a cannon has much more mass than the cannonball

as bronco brown steps off a hovering high flying helicopter and falls through the air he experiences

acceleration

as bronco brown steps off a hovering high flying helicopter and falls through the air he experiences

all of the above

the force dropped apple hitting the grund depends upon

all of the above

a red car has a head on collision with an approaching blue car with the same magnitude of momentum. a green car driving with the same momentum as the other cars collide with an enormously massive wall. which of the three cars will experence the greatest imulse

all the same

two vehicles with equal magnitude of momentum traveling at right angles to eachother undergo an inelastic collision. The combined wreck moves in a direction

at 45 degress to the direction of either car before collision

Youre driving down the highway and a bug splatters into your windshield which undergoes the greater change in momentumduring the time of contact

both the same

a karate chop is more effective if ones hand

bounce upon impact

it is correct to say the impulse is equal to

corresponding change in momentum

when bullets are fired from an airplane in the forward direction the momentum of the airplane is

decreased

an open freight car rolls friction free along a horizontal track in a pouring ran that falls vertically. as water accumulates in the car the cars speed

decreases

when freddy frog drops vertically from a treee onto a horizontally moving skateboard the speed of the skateboard

decreases

if all people animals trains trucks all over the world began to walk or run towards the east

earth would spin a bit slower

which has greater momentum when moving

either of these depending on speed

Elastic Collision

even though objects bounce off eachother their shape does not change

the force that accelerates a rocket in outerspace is exerted by the

exhausr gases

Momentum

final times time

two vehicles with equal magnitudes of momentum traveling at right angles to each other undergo an inelastic collision. Magnitude of momentum for the combined wreck is

greater than the magnitude of momentum of either car before collision

a softer landing occurs when a falling object bounces from a surface

in a extended time

a large heavy truck and a small baby carriage roll down a hill. neglecting friction at the bottom of the hill the baby carriage will likely have

less mmentum

if you cant avoid being hit by a fast moving object youll suffer a saller contact force if you can extend that force over a

longer time

impulse

mass times velocity

a golf ball moving forward with 1 unit of momentum strikes and bounces backward off a heavy boowling ball that is initally at rest and free to move. the bowling ball is set in motion with a momentum of

more than 1 unit

if severl balls are thrown straight up with different inital speeds the quantity that will have same value along their paths is their

move away from each othher but at different speeds

if a monkey floating in outespace throws his hat away the hat and the monkey will both

move away from eachother but at different speeds

an astronaut floating alone in outer spave throws a baseball if the ball moves away at 2o m/ s the astronaut will

move in opposite direction at lower speed

the conservation of momentum is most closely related to

newtons 3rd law

the impulse momentum relationship is a direct result oof

newtons third law

Law of conservation of momentum

no external forces and there is a consistent moment

a sandbag motionless in outer space is hit by a three time as massice sandbad moving at 12 m/s they stick together and move at a speed of

none of the above

a karate expert executes a swift blos and breaks a cement block with her bare head the magnitude of the force on her hand is

same as the force applied to the block

Inelastic

the shape does change even though objects do not bounce off of eachother

to catch a fast moving ball you extend your hand forward before contact with the ball and let it ride backward in the direction of the balls motion. doing this reduces the force of the contact on your hand principally because the

time of contact is increased

a frieght train rolls along a track with a considdrable momentum. if it rolls at the same speed but has twice as much mass its momentum is

twice