Applying Newton's Laws

Question 1

Components of a vector quantity

Answer 1

A vector quantity such as force ⃗F can be broken into its scalar components F_X and F_Y, which indicate the effect of the force in two perpendicular directions.

Question 2

Static friction force

Answer 2

The force exerted by a surface on another surface (parallel to both surfaces) when they are not moving relative to each other. The force magnitude adjusts up to a maximum static friction force, depending on the force exerted on the object in an effort to start its motion.

Question 3

µ_s = ƒ_max / N

0 ≤ ƒs ≤ µsN

ƒ_k = µ_kN

Answer 3

Question 4

Kinetic friction force

Answer 4

The force exerted by surface on another surface (parallel to both surfaces) when the surfaces are moving relative to each other.

Question 5

Projectile motion

Answer 5

Projectiles are objects launched either horizontally or in an angle with the horizontal. Horizontal and vertical motions of projectiles are independent of each other. If we ignore the resistive force that air exerts on the projectile, then its horizontal acceleration is zero (a_x = 0) and it’s vertical acceleration is the free-fall acceleration (a_y = –g).

Question 6

Atwood’s machine

Answer 6