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Syllabus

give 7 examples of inertia of rest with explanation

^{2}, calculate the velocity with which the stone will hit the ground.How to find the least count of a spring balance?

seema buys few grains of gold at the poles as per the instructions of one of her friends. She hands over the same when she meets her at the equator . Will the friend agree with the weight of gold bought ? If not , why?

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?????????

range of the spring balanceexplain why a cricketer moves his hands backwards while catching a fast moving cricket ball.

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

please explain newton's third law of motion!

what is the difference between magnitude and direction

if a man jumps out from a boat , the boat moves backwards . why?

Derive the equation for the conservation of momentum

23.Two stars of masses m and 5m are 3000 parsec apart. If the force on the large one is F, the force on the small star is(a) F/25 (b) F/5

(c) F (d) 5F

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.

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

Define force and write its si. Unit

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

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.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 body of mass 100g is at rest on smooth surface . A force of 0,2 N act on it for 5s . Calculate the distance travelled by the body .

Answer to be given by experts only

examples of newton's second law of motion

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.

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

on what factors does inertia of a body depend?

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

^{2}).an object weighs 10 n in air and displaces 7 n of water when it is immersed in it what is its density

an object looses 3n of its weight when immersed in a liquid calculate its weight in air if it shows a weight of 3n when immersed in water

3. a solid when immersed in water displaces 10 n of water calculate its weigt in air, if it weighs 3n when in water

4.a solid is partially immersed in 2/3rd of its volumee under the liquid if its density is 3 times that of the liquid find u of liquid1

2 weight of displaced liquid

5. a liquid whose density is thrice that of the solid when kept immersed in it displaces a certain quantity of water find the density of the solid and wt of the displaced liquid if the volume of the solid is 10 cc

6.BY how much should you increase the force exerted on a object if the area on which it acts is reduced by half in order to maintain the pressure

=

7.the upthrust offered by the liquid is 20 n,calculate its density if a solid of volume 20 cc is completely immersed in it to displace an equal volume of the liquid

8.will this solid slot or sink in water(density of water),if its density is 1/5 times of water

9.a solid of mass 500 g occupies 50cc of space will it float or sink in mercuryhg(13.6g per cc)

10.the relative density of iron is 7.8 find

a.density of iron

b.mass of iron

if its volume is 5m3

7.8*5

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

the velocity of a particle of a mass 150 g changes from 8 m/s to 12 m/s in two seconds . Assuming that a constant force acts on it, find the magnitude of the 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).

A. Doubles

B.increases by factor of four

C.stays same.

D.is cut in half.

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

how much force is needed to pull an object of mass 40kg in vertically upward direction with acceleration of 2.2m/second square

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.

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

Explain recoiling of gun with

third law of motion?An astronaut has 80 kg mass on earth.What is his weight on earth.

Why shockers are provided in automobile vehicles?which one would have more inertia 10 kg mass and 5 kg mass

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?

Q. Give an example where two equal and opposite forces do not form an action - reaction pair...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.....

1 A large plastic ball is dropped from the top of a tall building.

Define: INERTIA

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

centripetal force is required for a body to move on a circular path. what provides this force to the moon to move around the earth ? write an expression for it.

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?

What os Static inertia and dynamic inertia?

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

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.

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

A machine gun fires n bullets per second, each of mass m. If the speed of each bullet is u, then force of recoil is

a)mng

b)mnug

c)mnu

d)mnu/g

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

A bullet of mass 10g moving with a velocity of 400m/s gets embedded in a freely suspended wooden block of mass 900g.What is the velocity acquired by the block?

Few examples of balanced and unbalanced force?

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

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

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.please explain the activity 9.6 of force and laws of motion with some questions and answers related to it. i want the answers from meritnation expert

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

Q9. An Aluminium wire and a Steel wire of the same length and cross-section are joined end to end. The composite wire is hung from a rigid support and a load is suspended from the free end. If the increase in the length of the composite wire is 2.7 mm, the increased length of Aluminium and Steel wires are:

(y

_{Al}= 2 x 10^{11}N/m^{2}& y_{Steel}= 7 x 10^{11}N/m^{2})(1) 2.0 mm & 0.7 mm

(2) 0.9 mm & 1.5 mm

(3) 1.75 mm & 15 mm

(4) 0.7 mm & 1.5 mm

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

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

a) x= 5t-3 b) x= 5t

^{2}+8t-3 c) x= -5t^{2}+5t-3 d) 5t^{3}+4t^{2}-3