1.Law of Motion

Inertia of a body depends on

• Weight of the objects

• Acceleration due to gravity of the planets

• Mass of the object

• Both a & b

Impulse is equals to

• Rate of change of momentum

• Rate of force and time

• Change of momentum

• Rate of change of mass

Newton's III law is applicable

• For a body is at rest

• For a body in motion

• Both a & b

• Only for bodies with equal masses

Plotting a graph for momentum on the Y axis and time on X axis. Slope of momentum - time graph gives

• Impulsive force

• Acceleration

• Force

• Rate of force

In which of the following sport the turning of effect of force used

• Swimming

• Tennis

• Cycling

• Hockey

The unit of 'g' is ms^-2 invester it can be also expressed

• cm s^-1

• N kg^-1

• N m² kg^-1

• cm² s^-2

One kilogram force equals to

• 9.8 dyne

• 9.8 x 10⁴ N

• 98 x 10⁴ dyne

• 980 dyne

The mass of a body is measured on planet earth as M kg. When it is taken to a planet of radius half that of the Earth then it's value will be_____ kg

• 4 M

• 2 M

• M/4

• M

If the earth shrink to 50% of its real radius it's mass remaining the same , the weight of a body on the Earth will

• Decrease by 50%

• Increase by 50%

• Decrease by 25%

• Increase by 300 %

To project the rockets which of the following principle (s) is /(are) required ?

• Newton's third law of motion

• Newton's law gravitation

• Law of conservation of linear momentum

• Both a and b