34. Three pucks, A, B, and C, are shown sliding across ice at the noted speeds....
Think and Rank 3.68- The balls hav different masses and speeds. 9.0 m/s 8.5 m/s kg 1.2 kg kg 5.0 kg Part A Rank momenta from greatest to least. Rank from greatest to least. To rank items as equivalent, overlap them ANSWER: Reset Help Greatest Least The correct ranking cannot be determined. Part B Rank the impulses needed to stop the balls from greatest to least.
A man holding a rock sits on a sled that is sliding across a frozen lake (negligible friction) with a speed of 0.480 m/s. The total mass of the sled, man, and rock is 93.5 kg. The mass of the rock is 0.320 kg and the man can throw it with a speed of 16.5 m/s. Both speeds are relative to the ground. Determine the speed of the sled (in m/s) if the man throws the rock forward (i.e., in...
A hockey puck sliding across ice has an initial speed of 11 m/s but after 40.0 m has slowed down to 10.5 m/s. (10 pnts) (a) What is the coefficient of kinetic friction between the ice and puck? (b) What would be the coefficient of kinetic friction between the same ice and puck if you glued another identical puck on top of the first one? I'm not sure that I have all of the equations to solve this, so I'm...
An object with cross section A is shot horizontally across frictionless ice. Its initial velocity is v0x at t0=0s. Air resistance is not negligible. A 1.8 m wide, 1.5 m high, 1700 kg car with a drag coefficient of 0.35 hits a very slick patch of ice while going 24 m/s . Air resistance is not negligible. If friction is neglected, how long will it take until the car's speed drops to 11 m/s ? To 5.0 m/s ?
A contestant in a winter games event pushes a 52.0 kg block of ice across a frozen lake as shown in the figure below. The coefficient of static friction is 0.1 and the coefficient of kinetic friction is 0.03. (Assume A = 25°) (a) Calculate the minimum force F(in N) he must exert to get the block moving. 38.35 Did you draw a free-body diagram and identify the forces acting on the system? N (b) What is its acceleration (in...
Sliding on the Ice In the winter sport of curling, players give a 20 kg stone a push across a sheet of ice. The Slone moves approximately 40 m before coming to rest. The final position of the stone, in principle, onlyndepends on the initial speed at which it is launched and the force of friction between the ice and the stone, but team members can use brooms to sweep the ice in front of the stone to adjust its...
5, Some of the funniest videos on the web involve motorists sliding uncontrollably on icy roads. Here let's compare the typical stopping distances for a car sliding to a stop from an initial speed of 10.0 m/s on a dry horizontal road, an icy hori- zontal road, and (everyone's favorite) an icy hill. (a) How far does the car take to slide to a stop on a hori- zontal roadi if the coefficient of kinetic friction is = 0.60, which...
m1=70 kg m2=26 kg =320 F0=115 N b=017 s?1 t1=2077 s v0=119 ms Find Accelerattion at t1 Speed at ti Find the magnitude of the friction force from 1 on 2 at t1. You may use s=020 k=016 Total time it takes to stop the two blocks Two Blocks on Ice Two stacked boxes are sliding along an ice rink with an initial velocity of vo to the right. You are trying to stop the boxes so you exert a...
2. A crate is pushed horizontally at an angle of 20° across a rough surface as shown. The mass of the crate is 55 kg and the coefficient of kinetic friction M = 0.35. a) What applied force is required to keep the box moving at a constant acceleration of 3m/s2 ? b) What applied force is needed to keep the box moving at a constant speed, that is, no acceleration? (2 pts.) 3. A 60-kg skier starts from rest...
A metal crossbar with resistance R lies across conducting rails in a constant magnetic field B pointing out of the page as shown. The bar is moving at a speed v as indicated to the right. The rails have negligible electrical resistance compared to the crossbar, and you may neglect friction in the sliding of the crossbar. (a) What is the direction of the induced current flowing in the crossbar? Explain your reasoning. (b) Systematically develop an expression for the...