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Syllabus

give 7 examples of inertia of rest with explanation

a) a force can stop a lighter vehicle as well as a heavier vehicle which are moving

b) a force can accelerate a lighter vehicle more easily than a heavier vehicle that is moving

c) a force exerted by a lighter vehicle on collision with a heavier vehicle results in both the vehicles coming to a halt

d) force exerted by the escaping air from a balloon in the downward direction makes the balloon to go upwards

TO BE ANSWERED FAST THANK YOU

How to find the least count of a spring balance?

please give the correct ans from the 4 options

balanced forces ____________ a body

a) move b) accelerate c) retard d) deform

give examples of inertia of direction with explanation

how many types of inertia are there name them

define one newton force

1)why engine's mass is not considered to calculate the acceleration of the train

what is the formula of recoil velocity of a gun?????????

explain why a cricketer moves his hands backwards while catching a fast moving cricket ball.

a) exert large force on the ball

b) reduce the force exerted by the ball

c) increase the rate of change of momentum

d) keep the ball in hands firmly

TO BE ANSWERED FAST PLZ THANK YOU ^-^

please explain newton's third law of motion!

A bullet of mass 20g is horizontally fired with a velocity 150 msfrom a pistol of mass 2kg. What is the recoil velocity of the pistol ?

^{-1}if a man jumps out from a boat , the boat moves backwards . why?

Derive the equation for the conservation of momentum

Why does an air filled balloon rise up slightly when punctured from below?

1) The minute hand of a clock is 7 cm long. Calculate the distance covered and the displacement of minute hand of the clock from 9.00 AM to 9.30 AM.

2) An athlete completes a round of a circular track of diameter 200 m in 20s. Calculate the distance travelled by the athlete.

3)A boy is running on a straight road. He runs 500 m towards north in 2 minutes 10 seconds and then turns back and runs 200 m in 1 minute. Calculate his average speed and magnitude of average velocity during the whole journey.

4) Akshil drove his car with speed of 20 km/h while going to his college. When he returned to his home along the same route , the speed of the car is 30 km/h. Calculate the average speed of the car during the entire journey.

ALL THE FORMULAS IN THIS CHAPTER FORCE AND LAWS OF MOTION CAN ANY ONE SAY ME ASAP

name and define three different types of inertia and give an example each

What os Static inertia and dynamic inertia?

Define force and write its si. Unit

A body is moving with uniform acceleration. Is its momentum constant?Explain.

From a rifle of mass 4kg, a bullet of mass 50g is fired with an initial velocity of 35 ms

^{-1}. Calculate the initial recoil velocity of the rifle.Define inertia. On what factor does it depend? what are the different kinds of inertia? give one example of each.

The bullet of mass 10g moving with a velocity of 400m/s gets embeded in a freely suspended wooden block of mass700g .what is the velocity aquired by a block

a pile of one rupee coins remains intact when the lowest point in the pile is struck quickly by a knife. give reason

examples of newton's second law of motion

Show that Newton's first law of motion is contained in second law ?

why are road accidents at high speed are very much worse than accidents at low speed???

A body of mass 5 Kg is moving with a velocity of 10 m/s. A force is applied on it so that in 25 s , it attains a velocity of 35 m/s. calculate the value of the force applied.

A balloon is stuck to a straw with tape and the straw has a thread passing through it. The balloon's neck is tied with a thread.i)Which direction does the balloon move when the thread tied to its neck is removed and why?

ii)State the conclusion drawn from this activity.Give reasons for the following :

a] A helicopter must have two sets of blades in order to fly with stability.

b) If you are in an elevator and the cable breaks, jumping out just before the elevator hits the ground would not save you.

c)You usually jerk a paper towel from a roll in order to tear it instead of pulling it smoothly.

d) The stronger, heavier team in a tug of war does not create a larger tension in the rope than the weaker, lighter team.

on what factors does inertia of a body depend?

1 .A car of mass 1000kg and a bus of mass 8000kg are moving with the same velocity of 36

a rubber ball of mass 50 g falls from a height of 10 cm and rebounds to a height of 50 cm. determine the change in linear momentum and average force between the ball and the ground , taking time of contact as 0.1 s

What is the real definition of Second Law Of Motion

Two equal masses 2kg each moving with speeds of 10m/s and 5m/s in opposite direction collide elastically.Find their velocity after collision.

^{2}).Give reasons : Water drops are removed from from wet clothes by giving light jerk to the cloth.

how does a karate player breaks a slab of ice with a single blow?

DO THE UNBALANCED FORCE CAN ALSO CHANGE THE SHAPE OF THE OBJECT ?? IF YES THEN GIVE ONE EXAMPLE !!

An object of mass 2 kg is sliding with a constant velocity of 4 m s

^{–1}on a frictionless horizontal table. The force required to keep the object moving with the same velocity is(a) 32 N (b) 0 N (c) 2 (d) 8 N

a truck starts from rest and rolls down a hill with a constant acceleration .it travels a distance of 400m in 20s . find the acceleration . find the force acting on it if its mass is 7 metric tonne (1 metric tonne = 1000kg).

Place a water - filled tumbler on tray. Hold the tray and turn around as fast as u can. Why does water not spill?

A Bead Of Mass m is attached to one end of a spring of natural length R And spring constant

K = (√3+1)mg/R . other end of the spring is attached toa point A ON the vertical ring of radius R MAKING AN ANGLE OF 30 DEGREE WITH ITS CIRCUMFERENCE THE NORMAL REACTION AT THE BEAD WHEN THE SPRING IS ALLOWED TO MOVE FROM POINT A

A carpenter exerts a force of magnitude 1.5 N at right angles to the surface of a nail of mass 3 gram to drive it into the wood. If wood offers a resistive force of 0.6 N and the time of interaction of hammer and the nail 0.01 s, the depth through which the nail penetrates is?a stone of 1kg is thrown with a velocity of 20m/s. across a frozen surface of a lake and comes to rest after travelling a distance of 50m. what is the force of friction between the stone and the ice.

While doing an experiment to find the relationship between the weight of a rectangular wooden block lying on a horizontal table and the minimum force required to just move it using a spring balance ,it is observed that :

a)more inertia less force

b)less inertia more force

c)more inertia more force

d)no relationship between inertia and force

justify the statement also.

a hunter has a machine gun that can fire 50 g bullets with a velocity of 150 m/s . a 60 kg tiger springs at him with a velocity of 10 m/s . how many bullets must the hunter fire per second into the tiger in order to stop him in his track

Why shockers are provided in automobile vehicles?Why does the speed of an object change with time?

a bullet of mass 20g is horizontally fired with a velocity of 150m/s frm a pistol of mass 2kg. What is the recoil velocity of the pistol?

Find the initial velocity of the car which is stopped in 10 sec by applying brakes .The retardation due to brakes is 2.5m/sec sq.....

AN OBJECT OF MASS 2KG IS SLIDING WITH A CONSTANT VELOCITY OF 4m/s on a frictionless horizontal table. the force required to keep the object moving with the same velocity is _____________

Define: INERTIA

2) What can you say about the speed of a moving object if no force is acting on to it.?

3) Two forces of 5N &22N are acting in a body in the same direction what will be the

resultant force& in which direction will it act?

If the two forces in the above example would have been acting in the opposite direction

What would be the resultant force& in which direction will it act?

4) If we push the box with a small force, the box does not move, why?

5) What should be the force acting on an object moving with uniform velocity?

A bullet fired from a gun makes a clean whole in a window whereas a stone pebble thrown brakes the whole window.why?

What are the effects of the following on inertia of a body?

a) If force is doubled

b) If density is halved

c)If weight is reduced by three times

How much momentum will a dumbbell of mass 10 Kg transfer to the floor if it falls from a height of 80 cm? Take its downwards acceleration to be 10 m/s2?

If many forces of different magnitudes are acting on a body in different directions, in which direction will the body be accelerated?

can someone plz tell me the derivations of equations of motions without graph ..

A soda straw does not draw liquid if there is a tiny hole near its upper end.explain

why chinaware is wrapped in straw while transportation?

a bullet of mass 10 g is fired from a rifle with a velocity of 800 m/s . after passing through a mud wall 180cm thick, the velocity drops to 100m/s. calculate the average resistance of the wall.

Which law of motion can best describe the following

a) Shoulder bone fracture from recoil of a gun (which law)

b) Coin remain on the table, when table cloth is suddenly removed.(which law)

A gunman gets a jerk on firing a bullet.why??

^{-2}, ms^{-1}, Kg ms^{-1}, ms^{-2}.which one of the above can be used for measuring momentum of an object ? Writ the physical quantity that needs to be varied if the momentum of a body of a given mass has to be changed.

action and reaction forces do not balance each other. why?

Few examples of balanced and unbalanced force?

why is it difficult to balance our body when we accidentally step on a peel of banana give reasons

A ball is gently dropped from a height of 30 m. If its velocity increases

uniformly at the rate of 10m/s2 with what velocity will it strike the groundand after what time will it strike the ground.An object of mass 1 kg travelling in a straight line with a velocity of 10 m s

^{−1}collides with, and sticks to, a stationary wooden block of mass 5 kg. Then they both move off together in the same straight line. Calculate the total momentum just before the impact and just after the impact. Also, calculate the velocity of the combined object.a) 2ms/t

^{2}Nb) ms/t N

c) ms

^{2}/2t Nd) ms

^{2}/t NAlso, please explain how the answer came.

An object of mass 100 kg is accelerated uniformly from a velocity of 5 m s

^{−1}to 8 ms

^{−1}in 6 s. Calculate the initial and final momentum of the object. Also, find the magnitude of the force exerted on the object.Explain recoiling of gun with

third law of motion?how a karate player can break a pile of tiles with a single blow of his hand

why does tiny droplets of water fly off when a wet towel is suddenly jerked?

if you shake the branches of tree,the fruits fall down. why?

Why does the balloon fully inflated with air rise up vertically for some distance when punctured from below? What do you understand by the term momentum?

A ball of mass 400g dropped from a height of 5m. A boy on the ground hits the ball vertically upwards with a bat with an force of 100N so that it attains a vertically height of 20m. The time for which the ball remains in contact with the bat? (g = 10m/s

^{2})a. Newton's 1st law

b. Newton's 2nd law

c. Newton's 3rd law

d. None of above

^{2})].When a carpet is beaten with a stick dust comes out. why?

a gun of mass X fires a bullet of mass 25g with a velocity of 40 m/s . calculate the value of X , if the recoil velocity of gun iz 0.5 m/s plz help