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You decided to take a break from college and go hiking in the wilderness of Canada. With yearly snowfalls in excess of 120 cm near Edmonton, Alberta, you find it necessary to purchase a pair of snow shoes. After a trip to the local sporting goods store, you realize that any commercial pair is out of your price range. Making them would be significantly cheaper. If you wanted to only compress snow 1 cm while standing, what would the area of each snow shoe have to be? (Approximate the snow as a spring system with a spring constant per unit area of 1.96×105 N/m3 and estimate your mass.)
Once your snow shoes are made, you finally travel to the trails. You walk up and orient yourself perpen- dicular to a stream, observing that it is flowing at 1 m/s. Something catches your eye and you look up at a 45? angle from the horizontal. You spot a weasel climbing a tree branch over a stream. In this -20?C winter weather, trees are not as flexible and snap when put under too much stress. This particular weasel is a little too heavy for the tree limb, causing it to brake, sending the poor woodland creature falling into the water directly in front of you. You hear the crack of the tree 22 ms after you see it start to fall. How fast is the weasel moving when it hits the water?
The weasel starts drifting towards a waterfall. Luckily a beaver dam (2 m wide) is 10 m downstream from where you are standing (P). You can only run at a top speed of 2 m/s in the homemade snow shoes. If the cross-sectional area of the stream decreases by factor of 10× while passing through the dam, can you catch and save the weasel before it moves past the dam (X), down the waterfall?
If it takes him 0.250 s to get the brakes on and he is 30.0 m from the intersection when he sees the light, elucidate will he be able to stop in time?
I put a packing peanut on top of it, and it only took one rotation--or crank--to knock the material off from the machine and onto the ground. mass of the peanut=.001 kg, distance from the machine to the peanut=.0005m.
If it takes a fish 0.20s to perform evasive action, at illustrate what minimum height must it spot the pelican to escape? Assume the fish is at the surface of the water.
Consider a large parallel plate capacitor with circular plates of radius R. suppose that the electric field between the plates is increasing.
a 600 ton Boeing business jet is flying at 500 mph at a constant altitude of 35,00 ft. if the jet is holding passengers as cargo amounting to a weight of 37 tons, what is the lifting force acting on the jet provided by the air?
The 2.0 kg, 20 cm diameter disk is spinning at 320 rpm. How much friction force must the brake apply to the rim to bring the disk to a halt in 2.0 s.
You are setting up two standing string waves. You have a length of uniform piano wire that is 6.0m long and has a mass of 0.150kg . You cut this into two lengths, one of 2.6m and the other of 3.4m , and place each length under tension. What should..
Bronco Brown is mowing his lawn. He applies a force F along the handle of the lawnmower as shown. Bronco moves the mower at constant velocity.
The molecule has a rotational kinetic energy that is of the translational kinetic energy of its center of mass. What then is molecule's angular speed about the center of mass.
A particle moves with constant acceleration a . The expression vi+at represents the particle's velocity at what instant in time? Here are the choices.
The aluminum bomb has a mass of 0.725 kg and is placed in 2.6kg of water contained in an aluminum calorimeter cup of mass 0.624 kg. The initial temperature of the mixture is 15°C, and its temperature after ignition is 53.5°C.
A uniform plank of length 5.8m and weight 229N rests horizontally on two supports, with 1.10 m of the plank hanging over the right support (see the drawing). To what distance x can a person who weighs 450N walk on the overhanging part of the plank be..
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