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A leather ball of circumference 75.1 cm and mass 583 g is forced to the bottom of a swimming pool and then released. After initially accelerating upward, it rises at a constant velocity.
a) Calculate the buoyant force on the ball.
b) Calculate the drag force the ball experiences while it is moving upward at constant velocity.
A woman on a bridge 88.9 m high sees a raft floating at a constant speed on the river below, Find the speed of the raft
Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. What is the acceleration of the yellow car
A jet of water squirts out horizontally from a hole near the bottom of the tank, What is the height, h, of the water level in the tank
A lens with an index of refraction of 1.60 is to be coated with a material (n = 1.39) that will make the lens nonreflecting for yellow-orange light (? = 515 nm) normally incident on the lens
A worker pushes horizontally on a large crate with a force of 304 N and the crate is moved 4.4 m. How much work was done.
A 4.5kg squid takes in 1.75kg of water while at rest, and then expels the water at a speed of 3.5m/s, calculate the work done by the squid's muscles during this process
A square coil, enclosing an area with sides 2.7 cm long, is wrapped with 2,461 turns of wire. What average voltage is induced in the coil
Practical steam engines utilize 475°C steam, which is later exhausted at 300°C. What is the overall efficiency of the two engines
Find out the recoil velocity that the raft. At what height above the cannon should the net be placed in order to catch the daredevil.
A spring of constant 290 N/m is used to launch a 1.2 kg block along a horizontal surface whose coefficient of sliding friction is 0.27
An artillery shell is fired with initial velocity of 300 m/s at 55 angles above the horizontal. to clear an avalanche, it explodes on a mountainside 42s after firing. What is the x and y coordinates of the shell where it explodes, relative to its ..
A roofer accidently drops a bundle of shingles. If it hits the ground with a speed of 86 m/s, how fast was it moving 3 seconds earlier (g=10 m/s/s)
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