Physics-
General
Easy
Question
A particle moves for 20 s with velocity
and then moves with velocity
for another 20 s and finally moves with velocity
for next 20 s. What is the average velocity of the particle?
- Zero
The correct answer is: 
Average velocity is that uniform velocity with which the object will cover the same displacement in same interval of time as it does with its actual variable velocity during that time interval.
Here, total distance covered




Related Questions to study
Physics-
From the top of a tower, a particle is thrown vertically downwards with a velocity of
. The ratio of the distances, covered by it in the 3rd and 2nd seconds of the motion is (Take
)
From the top of a tower, a particle is thrown vertically downwards with a velocity of
. The ratio of the distances, covered by it in the 3rd and 2nd seconds of the motion is (Take
)
Physics-General
Physics-
The time taken by a block of wood (initially at rest)to slide down a smooth inclined plane
long (angle of inclination is
) is
The time taken by a block of wood (initially at rest)to slide down a smooth inclined plane
long (angle of inclination is
) is
Physics-General
Physics-
A ball is dropped on the floor from a height of
. It rebounds to a height of
. If the ball is in contact with the floor for
sec, the average acceleration during contact is
A ball is dropped on the floor from a height of
. It rebounds to a height of
. If the ball is in contact with the floor for
sec, the average acceleration during contact is
Physics-General
Physics-
The coordinates of a moving particle at any time
are given by
The speed of the particle at time
is given by
The coordinates of a moving particle at any time
are given by
The speed of the particle at time
is given by
Physics-General
Physics-
Two bodies of different masses are dropped from heights of 16 m and 25 m respectively. The ratio of the time taken by them to reach the ground is
Two bodies of different masses are dropped from heights of 16 m and 25 m respectively. The ratio of the time taken by them to reach the ground is
Physics-General
Physics-
A particle starts from rest. Its acceleration
versus time
is as shown in the figure. The maximum speed of the particle will be
A particle starts from rest. Its acceleration
versus time
is as shown in the figure. The maximum speed of the particle will be
Physics-General
Physics-
If a body starts from rest and travels
in the 6th second, then what is the acceleration
If a body starts from rest and travels
in the 6th second, then what is the acceleration
Physics-General
Physics-
A body is falling freely under gravity. The distances covered by the body in first, second and third minute of its motion are in the ratio
A body is falling freely under gravity. The distances covered by the body in first, second and third minute of its motion are in the ratio
Physics-General
Physics-
A body, thrown upwards with some velocity, reaches the maximum height of
Another body with double the mass thrown up, with double initial velocity will reach a maximum height of
A body, thrown upwards with some velocity, reaches the maximum height of
Another body with double the mass thrown up, with double initial velocity will reach a maximum height of
Physics-General
Physics-
graph for a particle is as shown. The distance travelled in the first
is
graph for a particle is as shown. The distance travelled in the first
is
Physics-General
Physics-
A body of
is moving with a velocity of
. If a force of
is applied on it for
in the same direction as its velocity, what will now be the velocity of the body
A body of
is moving with a velocity of
. If a force of
is applied on it for
in the same direction as its velocity, what will now be the velocity of the body
Physics-General
Physics-
A body is thrown vertically upwards. If air resistance is to be taken into account, then the time during which the body rises is
A body is thrown vertically upwards. If air resistance is to be taken into account, then the time during which the body rises is
Physics-General
Physics-
A body is travelling in a straight line with a uniformly increasing speed. Which one of the plot represents the change in distance
travelled with time 
A body is travelling in a straight line with a uniformly increasing speed. Which one of the plot represents the change in distance
travelled with time 
Physics-General
Physics-
From the top of a tower two stones, whose masses are in the ratio
are thrown one straight up with an initial speed
and the second straight down with the same speed
. Then, neglecting air resistance
From the top of a tower two stones, whose masses are in the ratio
are thrown one straight up with an initial speed
and the second straight down with the same speed
. Then, neglecting air resistance
Physics-General
Physics-
A cannon of a level plane is aimed at an angle
above the horizontal and a shell is fired muzzle velocity
towards a cliff
distance away. The height at which the canon strikes the cliff is given by
A cannon of a level plane is aimed at an angle
above the horizontal and a shell is fired muzzle velocity
towards a cliff
distance away. The height at which the canon strikes the cliff is given by
Physics-General