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A 6.2-m radius playground merry-go-round with a moment of inertia of 2400 kg·m2 is rotating freely with an angular speed of 1.5 rad/s. Two people, each having a mass of 65 kg, are standing right outside the edge of the merry-go-round and step on it with negligible speed. What is the angular speed of the merry-go-round right after the two people have stepped on?
During a rain storm, rain comes straight down with a velocity Vi = -15 m/s, find the average force exerted by the rain on the roof during a 3 second time interval
The peak wavelength for the blackbody radiation from a star corresponds to an energy of 2.92x10^ -19 J. what is the temperature of the star at the surface
A cannon fires a cannonball from the top of a wall at a speed of 25.58 m/s and an angle of 17.44 degrees from the horizontal. What is the horizontal distance from the wall where the fired cannonball hits the ground
A liquid with density of 1.65 x10 cubed kg/m cubed flows through 2 horizontal sections of tubing joined end to end. in the first section, the cross-sectional area is 10 cm2.
What is the resistance of a 1.7m -long copper wire that is 0.50mm in diameter? (Answer should be in ohms)
A ball whose mass is 1.3 kg is suspended from a spring whose stiffness is 3 N/m. Suppose this apparatus were taken to the Moon, where the strength of the gravitational field is only 1/6 of that on Earth. What would the period be on the Moon
Explain how fast will he be moving backward just after releasing the ball?
A 0.250 block moving vertically upward collides with a light vertical spring and compresses it 4.00 before coming to rest. If the spring constant is 53.0 , what was the initial speed of the block? (Ignore energy losses to sound and other factors d..
A student (m= 75kg) falls freely from rest and strikes the ground. During the collision with ground, he comes to rest in a time of 0.040s.
Atennis ball of mass 5.5*10-2and a speed of 39 M/s strikes a wall at a 45 degree angle, what is the direction of of the balls impuse in relation to the wall
A solar cell generates a potential difference of 0.094 V when a 560 ? resistor is connected across it, and a potential difference of 0.14 V when a 1100 ? resistor is substituted. What are the emf of the solar cell
You're 6.0 m from one wall of a house. You want to toss a ball to your friend who is 6.0 m from the opposite wall. What minimum speed will allow the ball to clear the roof
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