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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?

give examples of inertia of direction with explanation

how many types of inertia are there name them

define one newton force

You are applying force on the pan of single pan weighing balance and the pointer points to 100g. What is the force in newtons applied by you ?

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

please explain newton's third law of motion!

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

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

A body of mass 2 kg, initially moving with a velocity of 10 m/s, collides with another body of mass 5 kg at rest. After collision velocity of first body becomes 1 m/s. Find the velocity of second body.

Derive the equation for the conservation of momentum

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

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

a ball of mass 10kg is initially moving with a velocity of 50m/s. On applying a constant forv=ce on the ball for 2s, it acquires a velocity of 70m/s. Calculate: a) the initial momentum of the ball b)the final momentum of the ball c)the acceleration of the ball d) force applied on the ball

Define force and write its si. Unit

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 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?examples of newton's second law of motion

50 g each sitting inside,if it is moving at 60km/h speed and takes 5s to stop.

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.

What os Static inertia and dynamic inertia?

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

_{0 }be the angular amplitude, then why is,cos Ɵ_{0}3/5on what factors does inertia of a body depend?

Represent the following graphically (a) momentum versus velocity when mass is fixed.

(b) momentum versus mass when velocity is constant.

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

a) momentum of the object

b) mass of the object

c) speed of the object

d) shape of the object

PLZ ANSWER THE QUESTIONS FAST

^{2}).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

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

A bullet of mass 0.02kg is fired from a gun weighing 7.5 kg .if the initial velocity of the bullet is 200 m/ s ,calculate the speed with which the gun recoils.

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).

^{3 }ms^{-1}and gets embedded after travelling 5 cm. Calculate (i) the resistive force exerted by the sand on the bullet. (ii) the time taken by the bullet to come to rest.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 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

Why are vehicles fitted with shockers?

A monkey of mass 30 kg climbs a rope which can withstand a maximum tension 360 N . Find the maximum acceleration which this rope can tolerate for the climbing of monkey (g = 10 m/s^2) .

Experts, please answer fast.

Thank you

Why shockers are provided in automobile vehicles?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.....

Define: INERTIA

solution for science activity 9.5 for class 9

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

A frictionless wagon going at 2.5 meters per second is pushed with a force of 380 N, and its speed increases to 6.2 meters per second in 4.0 seconds. What is its mass -

(a) 410 kg (b) 420 kg

(c) 480 kg (d) 310 kg

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 ..

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??

Two spheres of mass 10g and 100g each falls on two pans of a table balance from a height of 40cm and 10cm repectively. If both are brought to rest in 0.1s, determine the force exerted by each sphere on the pans

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

"A force of 10 N acts on a particles of mass 0.4 kg.Find the acceleration of the particle."

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

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.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.Define momentum of a body.provide with the help of third law of motion that the total momentum of two bodies is conserved during collision,provided no external force acts.A car A of mass 1500kg travelling at 25m/s collides with another car B of mass1000kg travelling at 15m/s in the same direction.After collision the velocity of car A becomes 20m/s.Calculate the velocity of car B after collision.

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

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?

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}, calculate the velocity with which the stone will hit the ground.^{2})].When a carpet is beaten with a stick dust comes out. why?