Physics Chapter 2: Force, Torque, and Work

Question 1

1 Pa = ? N/m^2?

Answer 1

Pressure = F/A

1 Pa = 1 N/m^2

Question 2

Joule in base SI units

Answer 2

Question 3

Newton in base units

Answer 3

Question 4

Pressure in base units

Answer 4

Question 5

Elastic potential Energy formula

Answer 5

Question 6

Why does elastic potential energy have a 0.5 whereas gravitational potential energy doesn’t?

Answer 6

work is defined as force times displacement, but when the force is not constant (as in this case), you must integrate the force over the displacement:

Question 7

non-conservative forces

Answer 7

Air resistance (drag)
Tension in a rope with friction
Applied forces (like pushing a box)
Viscous forces (like resistance in a fluid)

Question 8

Centripetal Acceleration

Answer 8

Question 9

Power vs energy

Answer 9

Power (P) is the rate at which energy is transferred or work is done. It is measured in watts (W) or kilowatts (kW).
Energy (E) is the total amount of work done or stored energy. It is measured in joules (J) or kilojoules (kJ).

Question 10

Equations for power

Answer 10