MCQ
21841. In order to double the period of simple pendulum, the length of the string should be-
halved
quadrupled
doubled
tripled
21842. The force applied on a body of mass 100kg to produce an acceleration of 5m/s², is-
20N
500N
100N
none of these
21843. The velocity of a particle moving with simple harmonic motion is....at the mean position-
zero
equal
minimum
maximum
21844. The coefficient of restitution for inelastic bodies is-
zero
between 0 & 1
one
more than one
21845. The rate of doing work is known as-
potential energy
power
kinetic energy
none of these
21846. The linear velocity of a body rotating at o rad/s along a circular path of radius r is given by-
ω.г
ω/г
ω^2/г
ω^2 г
21847. One joule is equal to-
0.1 N-m
1 N-m
100 N-m
10 N-m
21848. The unit of angular velocity is-
m/min
revolution/min
rad/s
all of these
21849. When the spring of a watch is wound, it will possess-
a strain energy
heat energy
kinetic energy
electrical energy
21850. The unit of energy in SI unit is-
dyne
kg.m
joule
watt
21851. Joule is the unit of-
force
energy
work
power
21852. The slope on the road surface generally provided on the curve is known as-
angle of friction
angle of banking
angle of repose
none of these
21853. The force, by which the body is attracted towards the center of the earth, is called-
impulsive force
momentum
weight
mass
21854. The total motion possessed by a body, is called
impulsive force
momentum
weight
mass
21855. The angular velocity (in rad/s) of a body rotating at N revolutions per minute is-
πn/60
πn/180
2πn/60
2πn/180
21856. The potential energy of a vertically raised body is -----the kinetic energy of a vertically falling body.
equal to
greater than
less than
21857. The unit of work in SI unit is-
newton
joule
erg
kg.m
21858. The range of a projectile is maximum, when the angle of projection is-
30°
60°
45°
90°
21859. When a body falls freely under gravitational force, it possesses---- weight.
no
maximum
minimum
21860. One watt is equal to-
0.1 joule/s
100 joules/s
1 joule/s
10 joules/s