15. A kitten is sitting stationary on a skateboard. The kitten has a mass of 1.25 kg, and the skateboard has a mass of 3.5 kg. If the kitten remained on the skateboard while being pushed, what force would be
required to achieve an acceleration of 2.0 m/s2? Ignore friction.

As a pendulum bob swings back and forth several times, the maximum height it reaches becomes less and less. this is because more and more of the pendulum bob's energy is being transformed into a. heat energy b. kinetic energy c. potential energy d. kinetic energy and potential energy

The period of a pendulum varies directly as the square root of the length of the pendulum and inversely as the square root of the acceleration due to gravity. find the period when the length is 144 cm and the acceleration due to gravity is 980 cm per second squared, if the period is 7pi seconds when the length is 289 cm and the acceleration due to gravity is 980 cm per second squared.

Use 4 to 5 complete sentences, explain the concepts of beats and how beats are produces.