Satellites used to know the presence of minerals ores and ground-water are called
communication satellites
spying satellites
remote sensing satellites
weather prediction satellites
Name the physical quantity which undergoes a change with time in a periodic motion .
Speed
Mass
Displacement
None of these
Any motion that repeats itself at equal intervals of time is called
periodic motion
translatory motion
uniform motion
An imaginary co-ordinate system which is either at rest or in uniform motion and where Newton’s laws are valid is called an
Non-inertial frame of reference
Rotating frame of reference
Inertial frame of reference
A car is racing on a circular track of 180m radius with a speed of 32 ms-1. What should be the banking angle of the road to avoid chances of skidding of the vehicle at this speed without taking into consideration the friction between the tyre and the road?
45o
60o
30o
15o
1 revolution =
3π radians
2π radians
4π radians
A coin placed on a rotating turntable just slips, if it is placed at a distance of 8cm from the centre. If angular speed of the turntable is doubled, it will just slip at a distance of
1 cm
2 cm
4 cm
8 cm
The angular velocity is represented as
Ө
t
Ѡ
The force which continuously deflects a particle from its straight line path and makes it travel along a circular path is called
Normal force
Gravitational force
Centripetal force
The angle through which the radius vector rotates in a given time is called
Acceleration
Angular velocity
Angular displacement