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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?
How much time does the ball spend in the air. What is the longest "hole in one" that the golfer can make, if the ball does not roll when it hits green.
When the wire is removed, the spheres repel each other with an electrostatic force of 0.0394 N. Of the initial charges on the spheres, with a positive net charge, what was (a) the negative charge in coulombs on one of them and (b) the positive cha..
q1. before throwing a 1.49 kg discus an athlete rotates it along a circular path of radius 1.18 m. the maximum speed of
A ball dropped from a height of 4.00 m makes an elastic collision with the ground. Assuming no mechanical energy is lost due to air resistance, a) show that the ensuing motion is periodic, b) find the period of the motion.
The collision is not head-on. After the collision, the two pucks fly apart with the angles shown in the drawing. Find out the final speed of puck A also Find out the final speed of puck B. m/s
In the process of changing a flat tire, a motorist uses a hydraulic jack. She begins by applying a force of 41 N to the input piston, determine the force that the output plunger applies to the car
Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. What is the orbital period of the faster planet, in years
A vertical solid steel post of diameter = 21and length = 2.90 is required to support a load of mass = 8300 . You can ignore the weight of the post. Take free fall acceleration to be . 1) What is the stress in the post? 2) What is the strain in the po..
the motion of a projectile fired at t0. it initial speed is 50 ms and its initial projection angle is 45 degree from
A long, nonconducting, solid cylinder of radius Z cm has a nonuniform volume charge density ρ that is a function of the radialdistance r from the axis of the cylinder, as given byρ = Ar2, with A= Y µC/m5.
A sample of helium behaves as an ideal gas as energy is addedby heat at constant pressure from 273K to 393 K. what is the mass of helium present
Two carts collide in a perfectly elastic collision. Cart A has a mass of 1.2 kg and an initial velocity of 0.13 m/s. What is the final speed of each cart
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