One pool ball is launched in the positive x direction with a speed of 2.5 m/s. A second, identical pool ball is launched in the negative x direction with a speed of 1.2 m/s. The two collide in a glancing collision (not head on) and the second ball is deflected directly in the positive y direction with a speed of 1.4 m/s. A. Determine the final velocity of the first ball. Give your answer in unit vector notation.
B. If the collision took place in a time interval of 0.080 s and the mass of the pool balls is 0.16 kg, determine the magnitude and direction of the force acting on the first pool ball.

The car hoist allows the car to be driven onto the platform, after which the rear wheels are raised. if the loading from both rear wheels is 1380 lb, determine the force in the hydraulic cylinder ab. neglect the weight of the platform itself. member bcd is a right-angle bell crank pinned to the ramp at c. the force is positive if in tension, negative if in compression.

Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?

You throw a small rock straight up from the edge of a highway bridge that crosses a river. the rock passes you on its way down, 7.00 s after it was thrown. what is the speed of the rock just before it reaches the water 28.0 m below the point where the rock left your hand? ignore air resistance.