Inertia of a body depends on 

(a)

weight of the object

(b)

acceleration due to gravity of the planet

(c)

mass of the object

(d)

Both a & b

Newton’s III law is applicable

(a)

for a body is at rest

(b)

for a body in motion

(c)

both a & b

(d)

only for bodies with equal masses

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

(a)

swimming

(b)

tennis

(c)

cycling

(d)

hockey

One kilogram force equals to

(a)

9.8 dyne

(b)

9.8 × 10⁴ N

(c)

98 × 10⁴ dyne

(d)

980 dyne

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%