Question

A. Give the english and SI unit for the following:

1) work

2) power

3) kinetic energy ( particle)

4) linear Impulse

5)linear momentum

6)Angular momentum about a fixed point “O” ( particle

7)Mass moment of inertia

8) 2nd area moment of inertia

9) 1st area moment of inertia

10) 3rd area moment of inertia

11)moment of force about given point “o”

12) couple

13) kinetic energy of rotating rigid body about fixed axis

14) angular momentum of a rotating rigid body about a fixed axis

B. Difine the following :

1) britich thermal unit

2) hoursepower

Answer 1

A)

The english and SI units of the following are -

1. WORK
English- British Thermal Unit (BTU)
SI- Joule (J)

2. POWER
English- Foot pounds force per second (ft-lbf/s)
SI- Watt (W)

3. KINETIC ENERGY
English- British Thermal Unit (BTU)
SI- Joule (J)

4. LINEAR IMPULSE
English- Pound force second (lbf.s)
SI- Newton second (N.s)

5. LINEAR MOMENTUM
English- Pound foot per second (lb-ft/s)
SI- Kilogram metres per second (kg.m/s)

6. ANGULAR MOMENTUM ABOUT A FIXED POINT "O"
English- pound feet square per second (lbm-ft²/s)
SI- kilogram metre square per second (kg.m²/s)

7. MASS MOMENT OF INERTIA
  English- slug foot square (slug-ft²)
SI- kilogram metre square (kg.m²)

8. 2ND AREA MOMENT OF INERTIA
  English- inch to fourth power (in⁴)
SI- meter to fourth power (m⁴)

9. 1ST AREA MOMENT OF INERTIA
English- inch to third power (in³)
SI- meter to third power (m³)

10. 3RD AREA MOMENT OF INERTIA
English- inch to fifth power (in⁵)
SI- meter to fifth power (m⁵)

11. MOMENT OF FORCE ABOUT GIVEN POINT "O"
  English- Pound foot (lb-ft)
SI- Newton meter (N.m)

12. COUPLE
  English- pound force feet (lbf.ft)
SI- Newton metre (N.m)

13. KINETIC ENERGY OF ROTATING RIGID BODY ABOUT FIXED AXIS
English- British Thermal Unit (BTU)
SI- Joule (J)

14. ANGULAR MOMENTUM OF A ROTATING RIGID BODY ABOUT A FIXED AXIS
  English- pound feet square per second (lbm-ft³/s)
SI- kilogram metre square per second (kg.m³/s)

B)

1. British Thermal Unit (BTU)
BTU is an imperial unit usually used for the measurement of heat. It is defined as the amount of heat required to raise the temperature of one pound of water by one degree fahrenheit.

2. Horsepower (HP)
HP is an imperial unit usually used for the measurement of power. It is defined as the rate at which work is done.