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Syllabus

give 7 examples of inertia of rest with explanation

How to find the least count of a spring balance?

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

give examples of inertia of direction with explanation

how many types of inertia are there name them

define one newton force

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

a body hangs from a spring balance supported from the roof of an elevator .(a)

if the elevator has an upward accelaration of 2 m/s2 balance reads240 N. what is the true weight of the body?

under what circumstances will the balance read 160 N?

what will be the balance reading if the elevator cable breaks?

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

please explain newton's third law of motion!

How are safety belts helpful in preventing any accidents?

what is relation between the newton and dyne ?

_{1}and P_{2}watt at V volt are connected in series across V volt mains ,then their total power consumption P is 1) (P_{1}+P_{2}) 2)√P_{1 }P_{2 }3)P_{1}P_{2}/( P_{1}+P_{2}) 4)(P_{1 +}P_{2})/P_{1}P_{2. }Give reasons.if a man jumps out from a boat , the boat moves backwards . why?

Derive the equation for the conservation of momentum

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.

explain why , a runner presses the ground with his feet before he start his run.

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

3. What was the misbelief about the theory of motion before Newtonian motion theory?

Define force and write its si. Unit

a person is holding briefcase. show the forces acting on the briefcase .why is the briefcase at rest ?

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.examples of newton's second law of motion

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

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

If Newton's 3rdLaw of Motion is written in the form of F21 = F12; what is the mistake?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.

If the resultant of n forces of same magnitude acting at a point is zero, then the minimum value of n is ?

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

_{1}dissipates the power P when connected to a certain generator.If a resistance R_{2}is put in series with R_{1}the power dissipated by R_{1 }decreases.Give reasonson what factors does inertia of a body depend?

Q.10. A cyclotron is used to obtain 2 MeV protons. If frequency is 5 MHz and potential is 20 kV, the magnetic field necessary for resonance is

1) 2.32T

2) 0.327T

3) 0.528T

4) 0.389T

What is the real definition of Second Law Of Motion

A car with a dead battery, is to be pushed for some time so as to start it why? What does this example signify?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

A car and a motorcycle are moving with same momentum. When equal retarding forces are applied, the car comes to halt in t

_{1}secs. and the motorcycle in t_{2}secs. If the mass of the car is 5 times more than mass of motorcycle then which of the following is correct?(A) t

_{1}= t_{2}(B) t

_{1}= 5t_{2}(C) t

_{1}= 1/5 t_{2}(D) t

_{1}= 25t_{2}how does a karate player breaks a slab of ice with a single blow?

5 examples for the law of action reaction

5 examples for the law of inertia

5 examples for law of force

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 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.

why it is nessery to run along with a moving bus and in the same direction of bus, while alighting from it?

^{2}).The fruits fall off the branches when a strong wind blows. Give reason.

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

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?

how does one climb up a rope

Why shockers are provided in automobile vehicles?A person moves a distance of 3 km towards east, then 2km towards north and then 3.5km towards east. Find the distance covered, displacement of his motion.

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.....

Give two examples each when-

1) Force changes the speed of a moving body

2) Force stops a moving body

3) Force changes the direction of motion of a body

4) Forces changes the shape and size of a body

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

Find the mutual contact force between A and B and between blocks B AND C.

A=3 kg

B=10kg

C=7 kg

F=60 N

(DRW FIGURE)

Define: INERTIA

A gardener waters the plants by a pipe of diameter 1 mm. The water comes out from the pipe atthe rate of 10 cm

^{3}/sec. The reactionary force exerted on the hand of the gardener is?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?

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

If we take out a piece of paper from under a book with a jerk , the book will not move . Explain.

why chinaware is wrapped in straw while transportation?

a) 3/2 g b) g c) 2/3 g d) g/3

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

Explain the meaning of inertia. Give appropriate examples to explain the inertia of rest and inertia of motion.

Few examples of balanced and unbalanced force?

a)inertia

b) momentum

c) impulse

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

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

A bullet when fired at a target has its velocity decreased to 50 % after penetrating 30 cm into it.Then the additional thickness it will penetrate in cm before coming to rest

a) 10 cm b) 30 cm c) 40 cm d) 60 cm

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.when a force acting on a body has equal and opposite reaction then why should the body move at alla 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.

FIND THE MUTUAL CONTACT FORCE BETWEEN BLOCKS A AND B AND BETWEEN BLOCKS B AND C.FU 60N,MASS OF A=3KG B= 7KG C=7KG

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 goalkeeper in a game of football pulls his hands backwards after holding the ball shot at the goal. This enables the goal keeper to

(a) exert larger force on the ball

(b) reduce the force exerted by the ball on hands

(c) increase the rate of change of momentum

(d) decrease the rate of change of momentumif you shake the branches of tree,the fruits fall down. why?

which one would have more inertia 10 kg mass and 5 kg mass

how a karate player can break a pile of tiles with a single blow of his hand

When a carpet is beaten with a stick dust comes out. why?

A force of 5 N gives a mass m

_{1}, an acceleration of 10 m s^{-2 }and a mass m_{2}, an acceleration of 20 m s^{-2}. what acceleration would it give if both the masses were tied together?A bomb of mass 'm' is thrown with velocity 'v'. It explodes and breaks into fragments. One fragment of mass 'm' immediately after the explosion come to rest. Determine the speed of the other fragment.

a) mv/(m-m1)

b) m/(m-m1)v

c) m1v/(m+m1)

d) mv/(m+m1)