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Two skaters, each of mass M are standing a slight distance apart on a nearly frictionless horizontal surface of ice (for example, a skating rink). Initially at rest, they throw a ball of mass m, back and forth between them. Each time, the ball has a speed of v (assume it travels horizontally).
a. What is the velocity of the first skater immediately after she throws the ball for the first time?
b. What is the velocity of the second skater, immediately after she catches the ball.
c. Just after the second skater throws the ball back, for the first time, what is her velocity?
d. After the ball has made 10 complete round trips, and the first skater is holding the ball, what is the velocity of each skater? What is the total momentum of the system of the two skaters and the ball?
A 508.6 N window washer is standing on a uniform scaffold supported by a vertical rope at each end. the scaffold weighs 386.7N and is 3.11m long. assume the windo washer stands 1.26m from one end. what is the force on the farther rope? answer in u..
The force involved in a collision is 1.0 × 10^2 newtons. What is the value of the change in momentum
A flat circle of radius 20 cm is placed in a uniform electric field of magnitude 6.6×102N/C, What is the electric flux through the circle when its face is at 30 to the field lines
A ball is attached to one end of a wire, the other end being fastened to the ceiling. The wire is held horizontal, Find the velocity (magnitude and direction) of the ball just before the collision
0.10 mol of argon gas is admitted to an evacuated 50 cm3 container at 20° C. The gas then undergoes isobaric heating to a temperature of 300° C. What is the final pressure of the gas? What is the final volume?
A person with mass mp = 75.0 kg stands on a spinning platform disk with a radius of R = 1.77 m and mass md = 188.0 kg. The disk is initially spinning at ? = 1.5 rad/s. The person then walks 2/3 of the way toward the center of the disk (ending 0.59..
In 1956, Frank Lloyd Wright proposed the construction of a mile-high building in Chicago. find the change in your weight if you were to ride an elevator from the street level, where you weigh 810 N, to the top of the building
Phil is standing on a third floor balcony, 10m above the ground. Where does the ball hit the ground
a hiker determines the length of a lake by listening for the echo of her shout reflected by a cliff at the far end of the lake. estimate the length of the lake
The drive propeller of a ship starts from rest and accelerates at 2.44 x 10-3 rad/s2 for 2.43 x 103 s. Find the total angular displacement of the propeller
A whale sends an undersea signal to its mate and then gets a response 4.5 seconds later. How far away is the whales mate
Find out the magnitude of the charge on the moving particle. The baby soon learns to bounce with utmost amplitude and minimum effort by bending her knees at what frequency.
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