Which type of energy does a swinging pendulum demonstrate? a. chemical energy b. only kinetic energy c. both potential and kinetic energy d. only potential energy

C: both potential and kinetic energy

Explanation:

Energy in a Pendulum. In a simple pendulum with no friction, mechanical energy is conserved. Total mechanical energy is a combination of kinetic energy and gravitational potential energy. As the pendulum swings back and forth, there is a constant exchange between kinetic energy and gravitational potential energy.

increase masses, decrease separation

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.