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.
In a school of 500 students,150 played hockey
250 played football,120 played table tennis and
100 played one of the three games.If 50
played both hockey and football,how many
played table tennis only?pls show workings with
diagram
A cord is wound around the circumference
of a bicycle wheel (without tyre) of
diameter 1 m. A mass of 2 kg is tied at
the end of the cord and it is allowed to
fall from rest. The weight falls 2 m in 4
s. The axle of the wheel is horizontal
and the wheel rotates with its plane
vertical. If g = 10 ms^(−2) , what is the
angular acceleration of the wheel?