The distance between point P(lat 65°S, long 25°E) and Q(lat 65°S, long X)
on the earth surface along the parallel of latitute is 2502.5 km. If π = ((22)/2)
and earth radius is 6370 km, find the two possible values of x.
A cyclist goes round a circular
track of radius 70m.The total mass
of bicycle and rider is 70kg.Calculate
the frictional force which will
ensure that the rider successfully
negotiates the track with a speed
of 25m/s.What happens to the
rider if μ=0.3?
A block of ice slides down a 45°
incline plane in twice the time it
takes to slide down a 45° frictionless
incline plane.What is the coefficient
of kinetic friction between the
ice block and the incline plqne.
A hemispherical bowl of radius R = 0.1
m is rotating about its own axis (which
is vertical) with an angular velocity ω.
A particle of mass 10^(−2) kg on the
frictionless inner surface of the bowl is
also rotating with the same ω. The
particle is at a height h from the bottom
of the bowl.
It is desired to measure g (acceleration
due to gravity) using the set up by
measuring h accurately. Assuming
that R and ω are known precisely and
that the least count in the measurement
of h is 10^(−4) m, what is the minimum
possible error Δg in the measured value
of g?
Compounds with high heat of formation
are less stable because
(1) it is difficult to synthesize them
(2) energy rich state leads to instability
(3) high temperature is required to
synthesize them
(4) molecules of such compounds are
distorted
A one kg ball rolling on a smooth
horizontal surface at 20 m s^(−1) comes to
the bottom of an inclined plane making
an angle of 30° with the horizontal.
Calculate K.E. of the ball when it is at
the bottom of incline. How far up the
incline will the ball roll? Neglect
friction.