Physics paper class IX

2: Which of the following is derived quantity:

• Length

• Mass

• Energy

1: Physical quantities are:

• Measurable quantities

• Non measurable quantities

Body possesses energy if it is capable to do:

• Eat

• Work

• Gain

The ir-regular or disordered motion of a body Is called:

• Vibratory motion

• Circular motion

• Random motion

Formula for work is:

• Force ×displacement

• Speed÷time

• Force÷displacement

The ratio of stress to tensile strain is called:

• Pascals law

• Stress

• Strain

• Youngs modulus

Device use to measure the temperature of a body is called:

• Kelvin

• Celcius

• Thermometer

Metals are good conductors of heat due to :

• Big size of there molecules

• Radiation

• Free electrons

In gases, heat is mainly transferred by :

• Convection

• Conduction

• Radiation

Turning effect of a force is called:

• Momentum

• Friction

• Torque