Science - Mechanisms: key terms

Question 1

rearrange to make V subject: Ek=1/2mv^2

Answer 1

V = 2Ek/m (square root)

Question 2

rearrange to make m subject: Ek=1/2mv^2

Answer 2

m = 2Ek/v^2

Question 3

Terminal Velocity: skydiver

Answer 3

1. AR small so accelerates down
2. speed increases –> AR increase
3. AR will equal SD’s weight –> balanced forced = constant speed(TV)
4. parachute –> AR increase = slow down
5. slow down = decrease AR –> balanced forces = lower TV

Question 4

assuming conservation of energy

Answer 4

Ek = Ep

Question 5

pressure

Answer 5

if area decrease –> pressure increases (same force)