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Motion In Straight Line

Question

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The odometer of car reads 40km at the beginning of trip and 76km after 40min. What is the average velocity of car?

Solution

Initial distance covered = 40 km
Distance covered after 40 mins of the trip = 76 km
Time taken = 40 min
Therefore, average speed of car = $fraction numerator Total space distance space travelled over denominator Total space time space taken end fraction$
$space space space space space space space equals fraction numerator 76 minus 40 over denominator 40 divided by 60 end fraction equals 54 space km divided by hr$

Some More Questions From Motion in Straight Line Chapter

Can a body be in motion in the frame associated with the body itself?

When an object in motion can be considered as particle or point object?

Can you think of physical phenomena involving the moon in which moon cannot be treated as particle?

A train is crossing the bridge. Can it be taken as a particle?

Can a train be taken a particle? Give an example in support of your answer.

A particle is moving along curved line in space. Is the motion one dimensional?

State which of the following are examples of one, two or three dimensional motion:

(a) A kite flying in the sky.

(b) The earth revolving around the sun.

(c) A train moving along the equator of the earth in clockwise direction.

(d) Accelerated motion of a particle in a straight line.

Define distance.

Define displacement.

Can magnitude of displacement be greater than distance travelled by particle?

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