THE FINAL PHYSICS

Question 1

State what is meant by laminar flow?

Answer 1

• Laminar flow has constant velocity
• No eddie currents
• Lines don’t cross

Question 2

State conditions for flow to be laminar

Answer 2

• Only applies to small spherical objects moving at low speeds with laminar flow or absence of turbulent flow

Question 3

How does replacing 3m wire with 2m wire affect the gradient and youngs modulus

Answer 3

• The extension decreases for 2m length increasing the gradient
• Youngs modulus remains the same as a constant for a material

Question 4

Define SHM

Answer 4

• When force providing acceleration acts towards equilibrium position
• a is proportional to -x

Question 5

Will car lose contact?

Answer 5

• Yes
• RF = W - NCF
• ma = mg - NCF
• a>g hence contact is lost