Ravi told his friend that his house is 1 ,km toward south from main Post Office. Express displacemen

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7. MOTION

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Ravi told his friend that his house is $1 \,km$ toward south from the main Post Office. Express displacement and the distance moved by the friend from the Post Office when he arrives at Ravi's house. Mention the reference point chosen by you.

Option A

Option B

Option C

Option D

Solution

Let the reference point be the Post Office. Let this be the origin of his motion. Since the motion is along a straight line, therefore, both distance moved and displacement will be same. Thus displacement and distance moved will be $1$ kilometre.

Standard 9

Science

What does the odometer of an automobile measures ? Which of the following is moving faster ? Justify your answer.

$(i)$ A scooter moving with a speed of $300\, m$ per minute.

$(ii)$ A car moving with a speed of $36 \,km$ per hour.

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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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$(a)$ Define circular motion.

$(b)$ "Uniform circular motion is an accelerated motion". Justify this statement with reason.

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Ravi told his friend that his house is $1 \,km$ toward south from the main Post Office. Express displacement and the distance moved by the friend from the Post Office when he arrives at Ravi's house. Mention the reference point chosen by you.

Solution

Similar Questions

What does the odometer of an automobile measures ? Which of the following is moving faster ? Justify your answer. $(i)$ A scooter moving with a speed of $300\, m$ per minute. $(ii)$ A car moving with a speed of $36 \,km$ per hour.

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.

$(a)$ Define circular motion. $(b)$ "Uniform circular motion is an accelerated motion". Justify this statement with reason. $(c)$ An artificial satellite is moving in a circular orbit of radius $42250\, km.$ Calculate its speed if it takes $24$ hours to revolve once around the earth.

What can we conclude about the motion of a body depicted by following velocity$-$time graphs ?

Ali while driving to school computes the average speed for his trip to be $20\, km h^{-1}$. On his return trip along the same route there is less traffic and the average speed is $30\, km h^{-1} .$ What is the average speed for Ali's trip ?

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What does the odometer of an automobile measures ? Which of the following is moving faster ? Justify your answer.

$(i)$ A scooter moving with a speed of $300\, m$ per minute.

$(ii)$ A car moving with a speed of $36 \,km$ per hour.

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.

$(a)$ Define circular motion.

$(b)$ "Uniform circular motion is an accelerated motion". Justify this statement with reason.

$(c)$ An artificial satellite is moving in a circular orbit of radius $42250\, km.$ Calculate its speed if it takes $24$ hours to revolve once around the earth.