PLEASE HELP
How much work is required to raise a 1200 kg rock 15 m?

In the image, the arrow is pointing to a celestial object. which attribute disqualifies the object from being a planet?

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

The rocket is fired vertically and tracked by the radar station shown. when θ reaches 66°, other corresponding measurements give the values r = 32700 ft, r¨ = 85 ft/sec2, and θ˙ = 0.019 rad/sec. calculate the magnitudes of the velocity and acceleration of the rocket at this position.