physics 5

1/3 m/s

a 1 kg glider and a 2 kg glider both slide toward each other at 1 m/s on an air track. they collide and stick. the combined mass moves at

1 kg m/s

a 1-kg chunk of putty moving at 1 m/s collides with and sticks to a 5-kg bowling ball initially at rest. the bowling ball and putty then move with a momentum of

5/s m/s

a 5 kg fish swimming at 1 m/s swallows an absent minded 1 kg fish at rest. the speed of the large fish after lunch is

6 m/s

a 5000 kg freight car collides with a 10,000 freight car at rest. they couple upon collision and move at 2 m/s. what was the initial speed of the 5000 kg car?

2/3 m/s

a 5000 kg freight car moving at 2 m/s collides with a 10,000 kg freight car at rest. they couple upon collision and move away at

mass than the cannonball

a cannon recoils while firing a cannonball. the speed of the cannon's recoil is relatively small because the cannon has much more

more momentum, more mass, less stopping distance

a car traveling along the highway brakes to a stop over a certain distance. more braking force is required if the car has

wind impact force

a fan attached to an ice sailcraft stalled on a windless day blows air into the sail that bounces backward upon impact. the boat moves in the direction of the

firecracker at the time of the burst

a firecracker bursts while freely falling. the combined momentum of its fragments equals the momentum of the

twice

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

bounces on impact

a karate chop is more effective if one's hand

same force applied to the block

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

3000 kg m/s

a motorcycle of a mass of 100 kg slowly rolls off the edge of a cliff and falls for three seconds before reaching the bottom of a gully. its momentum upon hitting the ground is

1 unit

a piece of putty moving with 1 unit of momentum strikes and sticks to a heavy bowling ball that is initially at rest. after the putty sticks to the ball, both move with a combined momentum of

greater momentum

a same size iron ball and wooden ball are dropped simultaneously from a tower and reach the ground at the same time. the iron ball has a

extended time

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

lower speed

an astronaut floating alone in outer space throws a baseball. if the ball moves away at 20 m/s, the astronaut will move in the opposite direction at a

increasing speed, decreasing acceleration, impulse

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

longer on the carpet

compared with falling on a stone floor, a wine glass may not break when it falls on a carpeted floor because the stopping time is

different speeds

if a monkey floating in outer space throws his hat away, the hat and the monkey will both move away from each other but at

longer time

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

corresponding change in momentum

impulse is equal to a

lengthened time of contact

padded dashboards in cars are safer in an accident than non padded ones because passengers hitting the dashboard encounter a

6 kg m/s

the change in momentum that occurs when a 1 kg ball traveling at 4 m/s strikes a wall and bounces back at 2 m/s is

bouncing

the greater efficiency achieved with the curved blades of a pelton wheel is due to

newtons 2nd law

the impulse momentum relationship is a direct result of

16 kg

the mass of a ball moving at 3 m/s with a momentum of 48 kg m/s is

3 m/s

the speed of a 4-kg ball with a momentum of 12 kg m/s is

time of contact is increased

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 ball's motion. doing this reduces the force of contact on your hand principally because the

zero

two billiard balls having the same mass and speed roll toward each other. what is their combined momentum after they meet

faster car

two identical freight cars roll without friction (one at 1 m/s, the other at 2 m/s) toward each other on a level track. they collide, couple together, and roll away in the direction of the

1/2 m/s

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

before collision

two vehicles with equal magnitudes of momentum traveling at right angles to each other undergo an inelastic collision. the combined wreck moves in a direction at 45 degrees to the direction of either car

speeding on a highway

very large momentum relative to earth's surface is a pickup truck

increased

when a boxer moves into an oncoming punch, the force experienced is

the same

whether a truck comes to a stop by crashing into a haystack or a brick wall, the impulse is

greater with the brick wall

whether a truck comes to a stop by crashing into a haystack or a brick wall, the stopping force is

both the same

which produces more force: driving into a very massive concrete wall with no "give" or having a head on collision with an identical car moving toward you at the same speed

both

youre driving down the highway and a bug splatters into your windshield. which undergoes the greater change in momentum during the time of contact