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Question1
A large flat block of mass 7m rests on a level, smooth tabletop (μk ≈ 0). On top of it is a much smaller block of mass m, with a coefficient of static friction between the two blocks of μs. If small block is pulled horizontally with constant force F, we desire both blocks to slide together across the table without slipping on each other. What is the main acceleration that the system can be given in terms of μs and g?
Question2
A village maintains a large tank with an open top, containing water for emergencies. The water can drain from the tank throughout a hose of diameter 6.60 cm. The hose ends with a nozzle of diameter 2.20 cm. A rubber stopper is inserted into a nozzle. The water level in the tank is kept 7.50 m above the nozzle.
(a) Analyse friction force exerted on the stopper by the nozzle.
(b) The stopper is removed. What mass of water flows from nozzle in 2.00 h? (c) Compute gauge pressure of the flowing water in the hose just behind the nozzle.
When one marble hit the end of the line of marbles, how many shot off the other end? Describe the momentum of the set of marbles before and after the collision
Consider two closely spaced and oppositely charged parallel metal plates. The plates are square with sides of length L and carry charges Q and -Q on their facing surfaces. What is the magnitude of the electric field in the region between the plate..
A solar cell generates a potential difference of 0.95 V when a 380 ? external resistance is connected across it, What is the internal resistance of the solar cell
A toy train rolls around a horizontal 1.30 diameter track. The coefficient of rolling friction is 0.10.
A delivery man travels 34.0 m north, 23.0 m east, 12.0 m south, then takes an elevator 32.0 m up into a building. What is the magnitude of his displacement
In a women's 100-m race, accelerating uniformly, Laura takes 1.87 s and Healan 3.12 s to attain their maximum speeds, which they each maintain for the rest of the race.
How much Power does it take to accelerate the 70,000 lb rail car from rest to 10mph in 20 feet with 1ft dia. wheels.
Two photons have different frequencies f1 and f2 . If the ratio of their momenta is 22.5, what is the ratio of their frequencies
A 0.15-kg of aluminum contains 0.2 kg of water. Initially, the water and the cup have a com- mon temperature of 18 0C, find the specific heat capacity of the unknown material
Suppose instead the car hits a concrete abutment at full speed and is brought to a stop in 2.00 m. Calculate the force exerted on the car
Two blocks are connected by a frictionless pulley as shown. Block A has a mass of 71 kg and block B has a mass of 150 kg. Find the acceleration a of block A (in m/s2)
An additional magnetic field, horizontal and to the right, of 0.3 T is turned on. What are the magnitude and direction of the torque vector on the loop?In Nm
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