Question Pool Motion and Laws of Motion

Motion and Laws of Motion - SAMAGRA Question Pool & Answers | Class 9 English Medium

Kerala Syllabus SAMAGRA SCERT SAMAGRA Question Pool for Class 9 English Medium Physics Motion and Laws of Motion

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Qn 1.

Write two examples of uniform circular motion



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Qn 2.

When air exits a balloon filled with air, the balloon moves against the airflow. Explain its action and reactions?



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Qn 3.

If a car with a 1000 kg mass and a bus with a mass of 2000 kg travel at the same speed, what momentum is greater? Why?



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Qn 4.

A car traveling with an acceleration of 5 m/s2 starts moving from rest and travels 75 m by 25 s. Calculate final velocity of the car



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Qn 5.

What is the magnitude of the momentum of a motorcycle of a mass of 100 kg at rest?What is its momentum if this motorcycle when it travels at 40 m / s?



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Qn 6.

Write the relation between mass and inertia of an object.



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Qn 7.

Classify the following instances into  inertia of motion and inertiaof rest.

1.When a running bus stops suddenly, passengers tend to fall forward

 2. A fan rotates for a while even after it is switched off.

 3.The mango falls down when braches are shaked.

 4.it is possible to strike out a single carrom coin stacked one over the other without disturbing others



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Qn 8.

Find the first word pair relationship and complete the second word pair.

momentum; Kgm/s

Impulse:----------------



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Qn 9.

Write the reason

a) When the pole vault jumps, the impact is reduced by falling on the foamhead.

b) A cricketer lowers his hands while catching ball in order to increase time of catching.



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Qn 10.

Pick out the correct one

The direction of acceleration of an object in uniform circular motion is---------------

a) Towards the centre of circular path

b) Away from the centre of circula path

c)Along tangent to the circular path

d) nor acceleration



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Qn 11.

The same amount of force is applied for 4s in an object with mass of 10 kg. Calculate the force applied if the velocity of the object increases from 6 m / s to 14 m / s.



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Qn 12.

Write the reason

     1. Overloading vehicles is prohibited by law.

    2. It is difficult to roll a filled tar barrel than an empty one..



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Qn 13.

A car traveling at a speed of 90 Km (25 m / s) per hour, stops after 3 s when the brake is aplied. If mass of the car including passengers is 1200 kg, what is the force applied when the brake is operated?



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Qn 14.

Find out the reason

a. Standing passengers tend to fall forward when the running bus stops abruptly.

b. When the parked bus suddenly starts motion , the passengers fall backward.



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