What is the rate of change of velocity of an object in uniform motion?
Always equal to zero
Always less than one
Always greater than one
Either less than or equal to one.
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What determines the nature of the path followed by the particle?
Speed
Velocity
Acceleration
Both (b) and (c)
The nature of the path is decided by the direction of velocity, and the direction of acceleration. The trajectory can be a straight line, circle or a parabola depending on these factors.
The acceleration of a moving body can be found from
area under velocity - time graph
area under distance -time graph
slope of the velocity- time graph
slope of distance-time graph
Slope of velocity-time graph shows acceleration.
Acceleration of a particle changes when
direction of velocity changes
magnitude of velocity changes
speed changes
Both (a) and (b)
Because acceleration is a vector quantity.
The area under acceleration time graph gives
distance travelled
change in acceleration
force acting
change in velocity
Which of the following is the correct expression of instantaneous acceleration?
The displacement of a particle is represented by the following equation: where 5 is in meter and in second. The acceleration of the particle at is
zero
The velocity-time graph of a body is shown in fig. The ratio of average acceleration during the intervals and is
1
3
During , acceleration During , acceleration Required ratio
The distance time graph of a particle at time makes angles with the time axis. After one second, it makes angle with the time axis. What is the acceleration of the particle?
Velocity at time is . Velocity at time is . Acceleration is change in velocity in one second .
The displacement of a particle along a straight line at time is given by: . The acceleration of the particle is
Differentiated twice.
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