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Q1. A spelunker is surveying a care. He follows the passage 100 meters straight east, then 50 meters on a direction 30 degree west of north, then 150 meters at 45 degree west south. After a fourth unknown displacement he finds himself back where he started. Determine the magnitude and direction of the fourth displacement.
Q2. A 3 kg object id released from rest at a height of a 5 meter curved frictionless ramp. At the foot of the ramp is a spring force constant of k= 400n/m the object slides down the ramp and onto the spring compressing it to the distance x before coming momentarily at rest. What is x?
What is the ratio of the dynamic viscosity of air to that of water at standard pressure and a temperature of 20?C? Find the ratio of the kinematic viscosity of air to that of water for the same condition?
A 1.02 liter flask contains a certain quantity of ideal gas at 315 K. Then an equal number of molecules of the same gas are added to the flask, after which the absolute pressure is 1.60 times its original value. What is a final temperature.
What is the potential difference
An object at rest explodes into three pieces of equal masses. One moves east at 23 m/s, while the second piece moves northwest at 14 m/s. Estimate the velocity of the third piece? Suppose each piece has a mass of 2 kg.
A loudspeaker of mass 20.00 {rm kg} is suspended the distance of h = 2.40 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 3.50 {rm m}.
Speedboat A negotiates a curve whose radius is 198 m. Speedboat B negotiates a curve whose radius is 290 m. Each boat experiences the same centripetal acceleration. What is the ratio vA/vB of the speeds of boats.
If the average frequency emitted by a 200,-, rm W light bulb is 5.00 times 10^ {14}, {rm Hz}, and 10.0 percent of the input power is emitted as visible light, about how many visible-light photons are emitted per second.
A 950-kg car traveling west at 15.0 m/s collides with a 750-kg car traveling north at 20.0 m/s. The cars stick together. Find the speed of the wreckage just after the collision
A 116 kg chesterfield is pushed up a frictionless ramp at the constant speed by a delivery person. If the ramp is inclined at 25.80° to horizontal. What is the magnitude of the normal force that is exerted on the chesterfield by the ramp.
Find the coefficient of friction between crate and floor
A 1530 kg car is travelling with the speed of 15.0 m/s. What is the magnitude of the horizontal net force that is required to bring the car to the halt in a distance of 40.00 m.
The dummy in a crash test has a head of mass 3 kg. The dummy is strapped in firmly so that the body does not move. The car's forward speed changes from 24 m/s to zero in 0.23 s.
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