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A red ball is thrown down with an initial speed of 1 m/s from a height of 27 meters above the ground. Then, 0.7 seconds after the red ball is thrown, a blue ball is thrown upward with an initial speed of 24.6 m/s, from a height of 0.8 meters above the ground. The force of gravity due to the earth results in the balls each having a constant downward acceleration of 9.81 m/s2.
1/ What is the speed of the red ball right before it hits the ground?
2/ How long does it take the red ball to reach the ground?
3/ What is the maximum height the blue ball reaches?
4/ What is the height of the blue ball 1.8 seconds after the red ball is thrown?
5/ How long after the red ball is thrown are the two balls in the air at the same height?
An object, mass 1.48 kg, moves in a horizontal circle with a radius of 1.52m. The object has an intial velocity of 28.0 m s-1. If the kinetic coefficient of friction between object and surface is 0.382.
Compute the coefficient of kinetic friction
A gas is contained in a cubic box whose sides are 3m long. If the gas is initially at 80 K, and it is heated up to 320 K at constant volume, What is the final pressure
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