Exam 6: Momentum

A fan attached to an ice sailcraft stalled on a windless day blows air into the sail that bounces backward upon impact.The boat can

You're driving down the highway and a bug spatters into your windshield.Which undergoes the greater change in momentum during the time of contact?

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 a mass of 5 kg and is at rest.If they stick upon collision,their speed after collision will be

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

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

According to the impulse-momentum equation Ft = change in (mv),a person will suffer less injury falling on a wooden floor which "gives" than on a more rigid cement floor.The "F" in the above equation stands for the force exerted on the

Recoil is noticeable if we throw a heavy ball while standing on roller skates.If instead we go through the motions of throwing the ball but hold onto it,our net recoil will be

A 5-kg shark swimming at a speed of 1 m/s swallows an absent-minded 1-kg fish swimming toward it at 4 m/s.The speed of the shark after this meal is

A 5000-kg freight car moving at 2 m/s runs into a 10,000-kg freight car at rest.They couple upon collision and move away as one body at

A bungee jumper attains a speed of 30 m/s just as the bungee cord begins to stretch.If the period of stretch is 2 s,the magnitude of the jumper's average deceleration is about

An astronaut ,floating alone in outer space,throws a baseball.If the ball floats away at a speed of 20 meters per second,the astronaut will

Compared to the force that brings a small car to a stop,the force required to bring a heavy truck to a stop

When you are in the way of a fast-moving object and can't get out of its way,you will suffer a smaller force of impact if you decrease its momentum over a

A rifle of mass 2 kg is suspended by strings.The rifle fires a bullet of mass 0.01 kg at a speed of 200 m/s.The recoil velocity of the rifle is about

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

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

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 and stick.The combined mass moves at

A 5-kg fish swimming at a speed of 1 m/s swallows an absent-minded 1-kg fish at rest.The speed of the larger fish after this lunch is

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

A 1000-kg car moving at 10 m/s brakes to a stop in 5 s.The average braking force is