Which is true about the total mechanical energy of a pendulum in the absence of friction?

1. it exhibits constant velocity motion.

2. it exhibits simple harmonic motion.

3. it exhibits circular motion.

4. it exhibits only upward motion.

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

World class speed skaters can skate a 3,000-m course in about 4 minutes.what is their average speed for this course? a. 12.5 m/sb. 1.33 m/sc. 1.25 m/sd. 13.3 m/s

Alarge cruise ship of mass 7.00 ✕ 107 kg has a speed of 11.6 m/s at some instant. (a) what is the ship's kinetic energy at this time? (b) how much work is required to stop it? (give the work done on the ship. include the sign of the value in your answer.) (c) what is the magnitude of the constant force required to stop it as it undergoes a displacement of 3.00 km?