What is reaction time? On what does the reaction time depend?
(N/A) Reaction time is defined as the time a person takes to observe,think,and finally react to a given situation. For example,if a driver sees an obstacle on the road,the time elapsed between seeing the obstacle and applying the brakes is the reaction time.
Reaction time depends on the following factors:
$1$. The complexity of the situation: $A$ more complex or unexpected situation requires more time to process.
$2$. The individual's alertness and physical condition: Factors like fatigue,age,or distractions significantly influence how quickly a person can respond.
Reaction time depends on the following factors:
$1$. The complexity of the situation: $A$ more complex or unexpected situation requires more time to process.
$2$. The individual's alertness and physical condition: Factors like fatigue,age,or distractions significantly influence how quickly a person can respond.
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During the first $18\,min$ of a $60\,min$ trip,a car has an average speed of $11\,m/s$. What should be the average speed for the remaining $42\,min$ so that the car has an average speed of $21\,m/s$ for the entire trip (in $,m/s$)?
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View Solution$A$ particle is constrained to move on a straight line path. It returns to the starting point after $10\, s$. The total distance covered by the particle during this time is $30\, m$. Which of the following statements about the motion of the particle is false?
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View SolutionStatement $(I)$: An object subjected to velocities $\overrightarrow{v_1}$ and $\overrightarrow{v_2}$ has a resultant velocity with magnitude $|\vec{v}| = |\overrightarrow{v_1}| + |\overrightarrow{v_2}|$.
Statement $(II)$: The magnitude of displacement is either less than or equal to the path length of an object between two points.
Statement $(III)$: The instantaneous acceleration is the limiting value of the average acceleration as the time interval approaches zero.
Which of the following is correct?
Statement $(II)$: The magnitude of displacement is either less than or equal to the path length of an object between two points.
Statement $(III)$: The instantaneous acceleration is the limiting value of the average acceleration as the time interval approaches zero.
Which of the following is correct?
$A$ ball is thrown vertically upward from a location and returns to the same location. Which of the following statements are correct?
$(a)$ Distance travelled by the ball can be zero.
$(b)$ Displacement of the ball is zero.
$(c)$ Average velocity of the ball is zero.
$(d)$ Acceleration of the ball is zero.
$(a)$ Distance travelled by the ball can be zero.
$(b)$ Displacement of the ball is zero.
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View Solution$A$ particle moving along a straight line covers the first half of the distance with a speed of $3 \, m \, s^{-1}$. The other half of the distance is covered in two equal time intervals with speeds of $4.5 \, m \, s^{-1}$ and $7.5 \, m \, s^{-1}$ respectively. The average speed of the particle during the motion is:
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