(a) Differentiate between uniform linear and uniform circular motion. (b) Write any four examples of

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7. MOTION

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$(a)$ Differentiate between uniform linear and uniform circular motion.

$(b)$ Write any four examples of uniform circular motion.

$(c)$ Is uniform circular motion is accelerated motion ?

Option A

Option B

Option C

Option D

Solution

$(a)$ In uniform linear motion, a body moves along a straight line with constant speed. While in uniform circular motion, a body moves along a circular path with uniform speed.

$(b)$ $(i)$ Motion of particle on a wheel.

$(ii)$ Motion of satellite around a plant.

$(iii)$ Motion of moon around the earth.

$(iv)$ Motion of any particle on arm of clock.

$(c)$ Yes, in uniform circular motion, the direction of motion of the body changes continuously.

Standard 9

Science

The graph given below is the distance$-$time graph of an object.

$(i)$ Find the speed of the object during first four seconds of its journey.

$(ii)$ How long was it stationary ?

$(iii)$ Does it represent a real situation ? Justify your answer.

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The average time taken by a normal person to react to an emergency is one$-$fifteenth of a second and is called the 'reaction time'. If a bus is moving with a velocity of $60\, km h^{-1}$ and its driver sees a child running across the road, how much distance would. the bus had moved before he could press the brakes ? The reaction time of the people increases when they are intoxicated. How much distance had the bus moved if the reaction time of the driver were $\frac{1}{2}\, s$ under the influence of alcohol ?

hard

A girl walks along a straight path to drop a letter in the letterbox and comes back to her initial position. Her displacement-time graph is shown in Fig. Plot a velocity – time graph for the same.

medium

Write any two equations of motion for a body having uniform acceleration.

easy

The following displacement $-$ time graph shows the positions of a body at different times, Calculate the velocity of the body as it moves from : $(i) A-B \,(i i) B-C$ $(iii)$ $C-D$.

medium

$(a)$ Differentiate between uniform linear and uniform circular motion. $(b)$ Write any four examples of uniform circular motion. $(c)$ Is uniform circular motion is accelerated motion ?

Solution

Similar Questions

The graph given below is the distance$-$time graph of an object. $(i)$ Find the speed of the object during first four seconds of its journey. $(ii)$ How long was it stationary ? $(iii)$ Does it represent a real situation ? Justify your answer.

A girl walks along a straight path to drop a letter in the letterbox and comes back to her initial position. Her displacement-time graph is shown in Fig. Plot a velocity – time graph for the same.

Write any two equations of motion for a body having uniform acceleration.

The following displacement $-$ time graph shows the positions of a body at different times, Calculate the velocity of the body as it moves from : $(i) A-B \,(i i) B-C$ $(iii)$ $C-D$.

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$(a)$ Differentiate between uniform linear and uniform circular motion.

$(b)$ Write any four examples of uniform circular motion.

$(c)$ Is uniform circular motion is accelerated motion ?

The graph given below is the distance$-$time graph of an object.

$(i)$ Find the speed of the object during first four seconds of its journey.

$(ii)$ How long was it stationary ?

$(iii)$ Does it represent a real situation ? Justify your answer.