Physics-
General
Easy
Question
The wheel of toy car rotates about axis. It slows down from 400 rps to 200 rps in 2s. Then its angular retardation in 
is
- 200
- 100
- 400
- None of these
The correct answer is: 200
Given, 
rad 
rad
rad 
Related Questions to study
Physics-
A body of mass 2 kg attached to a string is whirled in a vertical circle of radius 5 m. The minimum speed of the body at lowest point so that the cord does not slacken even at the highest point is
A body of mass 2 kg attached to a string is whirled in a vertical circle of radius 5 m. The minimum speed of the body at lowest point so that the cord does not slacken even at the highest point is
Physics-General
Physics-
A particle of mass 
is executing uniform circular motion on a path of radius 
If 
is the magnitude of its linear momentum. The radial force acting on the particle is
A particle of mass is executing uniform circular motion on a path of radius If is the magnitude of its linear momentum. The radial force acting on the particle is
Physics-General
Physics-
The angle between the 
-axis and the vector 
is
The angle between the -axis and the vector is
Physics-General
Physics-
A body of mass 
moves in a circular path with uniform angular velocity. The motion of the body has constant
A body of mass moves in a circular path with uniform angular velocity. The motion of the body has constant
Physics-General
Physics-
If the magnitudes of scalar and vector products of two vectors and are 6 and 
respectively, then the angle between two vectors is
If the magnitudes of scalar and vector products of two vectors and are 6 and respectively, then the angle between two vectors is
Physics-General
Physics-
The horizontal range and the maximum height of a projectile are equal. The angle of projection of the projectile is
The horizontal range and the maximum height of a projectile are equal. The angle of projection of the projectile is
Physics-General
Physics-
A projectile is fired at an angle of 
to the horizontal such that the vertical component of its initial velocity is 
. Its time of flight is 
. Its velocity at 
has a magnitude of nearly
A projectile is fired at an angle of to the horizontal such that the vertical component of its initial velocity is . Its time of flight is . Its velocity at has a magnitude of nearly
Physics-General
Physics-
What should be the angular velocity of earth so that a body on its equator is weightless?
What should be the angular velocity of earth so that a body on its equator is weightless?
Physics-General
Physics-
A body of mass hangs at one end of a string of length 
, the other end of which is fixed. It is given a horizontal velocity so that the string would just reach where it makes an angle of 
with the vertical. The tension in the string at mean position is
A body of mass hangs at one end of a string of length , the other end of which is fixed. It is given a horizontal velocity so that the string would just reach where it makes an angle of with the vertical. The tension in the string at mean position is
Physics-General
Physics-
A car sometimes overturns while taking a turn. When it overturns, it is
A car sometimes overturns while taking a turn. When it overturns, it is
Physics-General
Physics-
The equation of trajectory of a projectile is 
if we assume 
, the range of projectile (in metre) is
The equation of trajectory of a projectile is if we assume , the range of projectile (in metre) is
Physics-General
Physics-
Given 
and 
. The angular momentum is
Given and . The angular momentum is
Physics-General
Physics-
A boy throws a cricket ball from the boundary to the wicket-keeper. If the frictional force due to air cannot be ignored, the forces acting on the ball at the position X are respected by
A boy throws a cricket ball from the boundary to the wicket-keeper. If the frictional force due to air cannot be ignored, the forces acting on the ball at the position X are respected byPhysics-General
Physics-General
Physics-
A bomb is dropped from an aeroplane flying horizontally with a velocity 
at an altitude of 980 m. The bomb will hit the ground after a time
A bomb is dropped from an aeroplane flying horizontally with a velocity at an altitude of 980 m. The bomb will hit the ground after a time
Physics-General
Physics-
A stone tied to one end of rope and rotated in a circular motion. If the string suddenly breaks, then the stone travels
A stone tied to one end of rope and rotated in a circular motion. If the string suddenly breaks, then the stone travels
Physics-General
