Unit 3 Topic 2 - Gravity and Motion

Question 1

Horizontal and Vertical components of a velocity vector are…

Answer 1

independent of each other.

Question 2

Define Normal Force

Answer 2

The component of a contact force that is perpendicular to the surface that an object is in contact with.

Question 3

Describe Forces acting on an Inclined Plane.

Answer 3

1. Normal Force - perpendicular to the surface.
2. Net Force - overall force acting on the object in the positive or negative direction.
3. Gravitational Force - the force perpendicular to the Earth accounting for mass.

Question 4

Describe Uniform Circular Motion.

Answer 4

Inward net force directed perpendicular to the velocity vector, the object is always changing its direction and undergoing an inward acceleration.

Question 5

Define Average Speed.

Answer 5

The total distance traveled by the body in total time.

Question 6

Define Average Period.

Answer 6

The time required for one complete cycle of vibration to pass a given point.

Question 7

Define Centripetal Acceleration.

Answer 7

The acceleration of a body traversing in a circular path.

Question 8

Define Centripetal Force.

Answer 8

Force which causes a change in direction of velocity toward the center of the circular motion.

Question 9

Newton’s Law of Universal Gravitation

Answer 9

Every particle attracts every other particle in the universe with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.