Laws of motion

In which of the following examples can you sense motion?

• The flight of a bird

• A stationary train

• A stone lying on a hill

• Books kept on a table

Velocity is

• Scalar quantity

• Vector quantity

The motion of a vehicle being driven through heavy traffic is an example of

• Uniform motion

• Non uniform motion

An electric fan keeps on rotating for some time even after it is switched off is an example of

• Newton's first law of motion

• Newton's second law of motion

• Newton's third law of motion

The working of rocket depends on

• Newton's first law of motion

• Newton's second law of motion

• Newton's third law of motion

F=ma comes from

• Newton's first law of motion

• Newton's second law of motion

• Newton's third law of motion

A car, initially at rest reaches a velocity of 50 km/hr in 10 seconds, this is an example of

• Positive acceleration

• Deceleration

• Zero acceleration

To accelerate a vehicle t 3m/s2 what force will be needed if the mass of the vehicle is equal to 100 kg?

• 300

• 0.03

• 3000

• 30

What is the SI unit of force?

• Joule

• Newton

• Dyne

• Kilogram

During collision.......... remains constant

• Mass

• Speed

• Total momentum

• Velocity