Author Question: What is kinetic energy? a. The energy stored in a dry cell. b. The energy an object has because of ... (Read 131 times)

Metfan725 · **on:** Jul 28, 2018

What is kinetic energy?
a. The energy stored in a dry cell.
b. The energy an object has because of its position.
c. The energy an object such as a spring has because of its shape.
d. The energy an object has because of its motion.
e. The energy that two objects at rest have because of their gravitational attraction.

Question 2

When a jet airplane takes off, how is momentum conserved?
a. Momentum is conserved because the jet of hot air pushes on the atmosphere around it.
b. Momentum is conserved because the air rushing out of the jet engine is moving out in the direction opposite to the plane's movement.
c. Momentum is not conserved because the jet was motionless and is now moving.
d. Momentum is conserved because molecules in the air move on average in all directions.
e. Momentum is conserved because the jet is collecting oxygen from the atmosphere.