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a high-speed train is built to be 600 m long the train is passing through a 500 m long tunnela at what speed according
a baseball is thrown vertically upward at a speed of 392 ms how much time elapsed before it reaches it highest points
an inflatable life raft is released from an air plane at 500 m altitude in level flight with an air speed of 20 ms in
a car moves with a constant speed of 60 mph what is the apparent weight of a 70 kg passenger when the car is at the
swimming at 150 ms relative to still water a swimmer heads directly across a river of width 80 m he arrives 450 m
the equation for motion for the ideal spring-mass system as derived in class is makx0 where mmass aacceleration
describe the effect on speed frequency and wavelength of a sound traveling from warm to cold air hintcold air is more
consider the roller coaster below in terms of speedwhere will it speed up and where will it slow downfrom this
a 0900 kg hammer is moving horizontally at 950 ms when it strikes a nail and comes to rest after driving it 100 cm
consider the following examples which involve energy being transformed from one kind to another identify the initial
the amount of chemical energy released in burning heating oil is approximately 130 mj per gallon this is the amount of
a projectile is fired at ground level with an initial speed of 36 ms at an angle of 34 degrees above the horizontal
please help with this problemssuppose you walk 16m straight west and then 225m straight north how far are you in
a cheetah can run very quickly over short distances assume a cheetah has a constant velocity of 330 ms and is
atoms bond to atoms through their electrons the following analogy will be used to help us understand how this occurs
the wind blows with a speed of 319 ms over the roof of your house assuming the air inside the house is relatively
initially at time t 0 a particle is moving vertically at 5 ms and horizontally at 0 ms its horizontal acceleration is
an artillery shell is fired at an angle of 481 above the horizontal ground with an initial speed of 1920 ms the
a ball with a mass of 15 kg is observed to move with an acceleration of 6 ms2 what is the size of the net force
calculate the momentum of a 2100 kg elephant charging a hunter at a speed of 750 mskgmiddotmscompare the elephants
an unfortunate astronaut loses his grip during a spacewalk and finds himself floating away from the space station
a system of four particles moves along one dimension the center of mass of the system is at rest and the particles do
speedy mike driving at 320 ms enters a one-lane tunnel he then observes a slow-moving van 160m ahead traveling at 550
an object moves with constant acceleration 445 ms2 and over a time interval reaches a final velocity of 100 ms if its
a woman wishing to know the height of a mountain measures the angle of elevation of the mountaintop as 12deg after