A child's swing of length L, attached y = L + y0 above the ground, reaches a maximum heigh of y = h during the swing. I am trying to write vector equations for the instantaneous velocity, as a function of L, g, h, y and y0. I am also trying to write an equation for the time it will take after...

If a Ski-Jumper leaves a ramp with a horizontal velocity of 10 metres per second and no vertical velocity and lands on the snow again after 5 seconds, how far does he jump and what is the height difference between the end of the ramp and the landing point? Also, if a second Ski-Jumper, whose...

can we apply the equations of motion, if acceleration is 2t where t is time?

An astronaut on the planet Zircon tosses a rock horizontally with a speed of 6.00 m/s. The rock falls through a vertical distance of 1.00 m and lands a horizontal distance of 7.00 m from the astronaut. What is the acceleration of gravity on Zircon?