CBSE practice Questions

Extra Mock questions for class 9 Physics

class 9 Physics questions

1 mark Physics questions:

Ques: State the meaning of uniform circular motion.

Ques: What is meant by free fall ?

Ques: State a relation between thrust and pressure.

Ques: Why is the motion of an athlete moving along the circular path an accelerated motion ?

Ques: State Newton’s first law of motion.

Ques: State any one phenomena related to the Universal Law of Gravitation.

Ques: State universal law of gravitation.

Ques: Define mass of an object ?

Ques: Why is G called the Universal Constant ?

Related: Maths Circles Important Questions

Ques: What can you say about the motion of a body if its displacement – time graph is a straight line parallel to the time axis ?

Ques: An athelete completes one round of a circular track of diameter 49m in 20s. Calculate the distance covered and displacement at the end of 30s.

Ques: Define Uniform acceleration

2 mark Physics questions:

Ques: A cyclist travels a distance of 4 km from P to Q and then moves a distance of 3 km at 2 right angle to PQ. Find his resultant displacement graphically.

Ques: What would happen if a fielder stops the fast moving ball suddenly ? Justify your answer.

Ques: A stone is dropped from the roof of a building. It takes 4s, to reach the ground. Find the height of the building, (g = 9.8 m/s2)

Ques: A bus decreases its speed from 80 km/h to 50 km/h in 4s. Find the acceleration of the bus.

Ques: Compare in tabular form the properties of a true solution and colloids with respect to Tyndall effect and stability.

Ques: What is Tyndall Effect ? “Tyndall Effect can be observed when sunlight passes through the canopy of dense forest.” Explain how this occurs.

Ques: A bus decreases its speed from 80 km/h to 50 km/h in 4s. Find the acceleration of the bus.

Ques: A cyclist travels a distance of 4 km from P to Q and then moves a distance of 3 km at right angle to PQ. Find his resultant displacement graphically.

Related: Classification Questions and Answers

Ques: A stone is dropped from the roof of a building. It takes 4s, to reach the ground. Find the height of the building

Ques: Write the relation for collision of two balls A and B and hence state the related law.

Ques: Name the SI unit of measuring temperature.
The boiling point of water is 100° C under normal atmospheric pressure. Convert this temperature in SI units.

Ques: Define thrust and pressure and state the SI units in which they are measured.

Ques: What are the changes possible on an object at rest if we apply on it:
(a) a balanced force.
(b) an unbalanced force

Ques: (a) Why does the rider fall in the forward direction when a running horse stops suddenly ?
(b) Why is it easier to stop a tennis ball in comparison to a cricket ball moving with the same speed ?

Ques: An athlete always runs some distance before taking a jump. Why ?

Ques: An electric train is moving with a velocity of 120 km/hr. How much distance will it cover in 30 s ?

Ques: Name the SI unit of measuring temperature.
The boiling point of water is 100° C under normal atmospheric pressure. Convert this temperature in SI units.

Ques: What is meant by relative density of a substance ? The relative density of mercury is 13.6. What is its density in SI units ? Given that the density of water is 1000 kg/m3.

Ques: A bullet of mass 25 g is fired horizontally with a velocity of 100 m/s from a gun of mass 5 kg. Calculate the recoil velocity of the gun.

Related: Mental Ability Reasoning Questions and Answers

Ques: What can you say about the motion of an object whose distance time graph is : (i) a straight line, parallel to the time axis
(ii) a straight line passing through the origin making an angle from the time axis.

Ques: Define force and state its any two effects.

Ques: Can a body have constant speed and still be accelerating ? Give an example.

3 marks Physics questions:

Ques: A ball thrown vertically upwards rises to a height of 20 m. Calculate :
(i) the velocity with which the ball is thrown upwards and
(ii) the time taken by the ball to reach the highest point, (g = 10 m/s2)

Ques: What happens to the Gravitational force between two objects if :
(a) the mass of one object is doubled.
(b) the distance between the objects is doubled.
(c) the masses of both the objects are doubled. Give reason in each case.

Ques: “We can easily move our hand in air but not through any solid material.” Justify the statement giving any three possible reasons.

Ques: A man pushes a box of mass 50 kg with force of 80 N. What will be the acceleration of the box due to this force ? What would be the acceleration if the mass were doubled ?

Ques: Explain why the value of ‘g’ differs while moving from poles to equator on the surface of the earth. State how would it’s value change on moving :
(a) towards the centre of the earth.
(b) away from the earth.

Ques: Assuming that the mass of Earth is 100 times larger than the mass of moon and the radius of Earth is about 4 times as that of moon, show that the weight of an object on moon is l/6th of that on earth.

Ques: Assuming that the mass of Earth is 100 times larger than the mass of moon and the radius of Earth is about 4 times as that of moon, show that the weight of an object on moon is l/6th of that on earth.

Related: Practice Number System Questions

Ques: A bus accelerates uniformly from 54 km/h to 72 km/h in 10 s. Calculate :
(i) the acceleration
(ii) the distance covered by the bus in that time

Ques: Define uniformly accelerated motion. Also show that the area under a velocity-time 3 graph gives the magnitude of displacement.

Ques: List in tabular form any three differences between ‘g’ and ‘G’.

Ques: What is uniform circular motion. How is uniform circular motion regarded as an accelerated motion. Give an example of such a motion.

Ques: State the action and reaction in the following :
(a) moving rocket
(b) firing of a bullet from a gun
(c) a person walking on the floor.

Ques: (a) Define momentum of a body.
(b) A ball is thrown vertically upward. What is its momentum at the highest point ?
(c) State the law of conservation of momentum.

Ques: A ball thrown up vertically returns to the thrower after 4 s. Find
(a) the velocity with which it was thrown up.
(b) the maximum height it reaches and
(c) its position after 3 s.

An object experiences a net zero external unbalanced force. Is it possible for the object to be moving with a non – zero velocity ? If yes, state the conditions that must be placed on the magnitude and direction of the velocity. If no, provide a reason

5 mark Physics questions:

Ques: (a) State Newton’s 1st and 3rd law of motion.
(b) A car of mass 1800 kg moving with a speed of 10 m/s is brought to rest after a covering a distance of 50m. Calculate the force acting on the car.

Ques: (a) State Newton’s second law of motion. Use this law to find a method to measure force acting of on an object.
(b) From a rifle of mass 4kg a bullet of mass 50kg is fired horizontally with an initial velocity of 40 ms-1. Calculate the initial recoil velocity of the rifle.

Ques: A ball thrown vertically upwards rises to a height of 20 m. calculate :
(i) the velocity with which the ball is thrown upwards and
(ii) the time taken by the ball to reach the highest point

Ques: Distinguish between mass and weight of an object. How does weight of an object change on moving from equator to poles ? When can the weight of an object be zero ?

Related: English Signs and Symbols You Should Know

Ques: A bus travels a of distance 120 km with a speed of 40 km/h and returns with a speed of 30 km/h. Calculate the average speed for the entire journey.

Ques: (a) State Newton’s second law of motion. Using this law obtain the unit of force and define it.
(b) State the Law of Conservation of Momentum. Using this law explain why a gun recoils.

Ques: (a) How much momentum will an object of mass 10 kg transfer to the floor, if it falls from a height of 0.8 m ?
(b) Explain why is it difficult for a fireman to hold a hose, which ejects large amount of water at a high velocity.

Ques: (a) In a high jump event the athletes are made to fall on a sand bed or on a cushioned bed. Why?
(b) Define momentum. State its S.I. unit.
(c) An object of mass 10 kg is accelerated uniformly from rest to a velocity of 8m/ s in 6 s, calculate the final momentum of the object.

Ques: (a) When a motor car make a sharp turn at a high speed, we tend to get thrown to one side. Why?
(b) State Newton’s 1st and 3rd law of motion.
(c) A force of 5N gives a body of mass ‘m’ an acceleration of 10m/s2, Calculate the mass of the body in grams.

Share with your Friends...
Share on Facebook
Facebook
Tweet about this on Twitter
Twitter
Share on LinkedIn
Linkedin
Pin on Pinterest
Pinterest
Print this page
Print

About the author

Vishal Arora

Leave a Comment