Impulse is equals to

(a)

rate of change of momentum

(b)

rate of force and time

(c)

change of momentum

(d)

rate of change of mass

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

(a)

swimming

(b)

tennis

(c)

cycling

(d)

hockey

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 its value will be ____kg

(a)

4 M

(b)

2 M

(c)

M/4

(d)

M

If the Earth shrinks to 50% of its real radius its mass remaining the same, the weight of a body on the Earth will

(a)

decrease by 50%

(b)

increase by 50%

(c)

decrease by 25%

(d)

increase by 300%

______ deals with the bodies which are at rest under the action of forces.

(a)

Statics

(b)

Kinematics

(c)

Dynamics

(d)

Mechanics

The resistance of a body to change its state of rest is called

(a)

inertia of rest

(b)

inertia of motion

(c)

momentum

(d)

inertia of direction

Mixing sugar in a glass of milk using a spoon is ______

(a)

force

(b)

momentum

(c)

inertia of motion

(d)

inertia of direction

A luggage is usually tied with a rope on the roof of the buses due to

(a)

inertia of motion

(b)

inertia of direction

(c)

inertia of rest

(d)

momentum

The sparks produced during sharpening a knife against a grinding wheel leaves the rim of the wheel tangentially. This is due to

(a)

inertia of rest

(b)

inertia of motion

(c)

inertia of direction

(d)

force applied

________ is an example for non - contact force.

(a)

magnetic

(b)

frictional

(c)

rolling ball

(d)

none

When you paddle a canoe, the canoe goes forward. This is an example of _______

(a)

Newton's I law

(b)

Newton's II law

(c)

Newton's III law

(d)

Law of conservation

The physical quantity which is equal to change in momentum is

(a)

velocity

(b)

acceleration

(c)

force

(d)

impulse

According to the Newton's III law of motion, action & reaction

(a)

always act on the same body

(b)

have same magnitude & direction

(c)

always act in opposite directions

(d)

act on either body at normal to each other

Newton's law of gravitation applies to

(a)

small bodies only

(b)

plants only

(c)

all bodies irrespective of their size

(d)

for solar system

If the radius of the earth were to shrink by one percent its mass remaining the same, the acceleration due to gravity on the earth's surface would

(a)

decrease unchanged

(b)

remains

(c)

increase

(d)

none of these

The value of universal gravitational constituent is

(a)

6.743 x 10^-11 Nm² kg^-1 

(b)

6.673 x 10^-11 Nm² kg^-1

(c)

6.743 X 10^-11 Nm^-2 kg^-1

(d)

6.673 x 10^-1 Nm^-2 kg^-1

The motion of falling bodies towards earth is due to

(a)

gravitational rotation

(b)

weightless mass

(c)

acceleration due to gravity

(d)

gravitational force

The acceleration due to gravity varies on earth with

(a)

distance

(b)

height

(c)

mass of an object

(d)

all the above

Cutting tools have sharp edges to

(a)

increase area of contact

(b)

decrease pressure

(c)

decreases area and increase pressure

(d)

increase area & increase pressure