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give 7 examples of inertia of rest with explanation
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
a pile of one rupee coins remains intact when the lowest point in the pile is struck quickly by a knife. give reason
define one newton force
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 rubber ball rebounds when struck against a hard floor. give reason.
please explain newton's third law of motion!
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.
name and define three different types of inertia and give an example each
Why are vehicles fitted with shockers?
Define force and write its si. Unit
Place a water - filled tumbler on tray. Hold the tray and turn around as fast as u can. Why does water not spill?
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
1 .A car of mass 1000kg and a bus of mass 8000kg are moving with the same velocity of 36
examples of newton's second law of motion
why are road accidents at high speed are very much worse than accidents at low speed???
The kinetic energy of a block of mass 3 kg is 150 J. Find its momentum.
i know it is explained in chapter but not nicely so plz do explain it without missing any step and with clear explanation and fast.
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.
Give reasons : Water drops are removed from from wet clothes by giving light jerk to the cloth.
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?
which one would have more inertia 10 kg mass and 5 kg mass
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
Q-two toy cars A and B are moving towards each other on a horizontal surface.The car A has mass of 60g and moves towards the right with a speed of 60cm/s. the car B has a mass of 100g moves toward the left with a speed of 20m/s . the 2 cars collide and get struck to each other . with what velocity will they move after the collision?
how does a karate player breaks a slab of ice with a single blow?
an iron sphere of 1kg is moving a velocoty of 20 m s-1on a cemented floor. It comes to rest after travelling a distance of 50m. Find the force of friction between the sphere and the floor.
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).
in ncert book of science activity 9.4 is given :
Make 2 chidren stand on 2 different carts and give them 1 sand bag and ask them to play catch - Catch . Do each of them recieve an instantaneous reaction of throwing sandbag (action) ?
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
how does one climb up a rope
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.....
When an angry man slaps his son,his hand exerts a force on the cheek of the son.According to Newton's third law the chhekalso exerts an equal force on the hand.Then why it is only the son weeps and not the father????
A bullet fired from a gun makes a clean whole in a window whereas a stone pebble thrown brakes the whole window.why?
Show that Newton's first law of motion is contained in second law ?
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.
EXPLAIN THE EXAMPLE OF SECOND LAW OF MOTION - USE OF SEAT BELT IN CAR
A gunman gets a jerk on firing a bullet.why??
action and reaction forces do not balance each other. why?
Few examples of balanced and unbalanced force?
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
why is it difficult to balance our body when we accidentally step on a peel of banana give reasons
A body is moving with uniform acceleration. Is its momentum constant?Explain.
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.
object of mass 100 kg is accelerated uniformly from a velocity of 5 m
to 8 m s−1
in 6 s. Calculate the initial and final momentum of the object. Also,
find the magnitude of the force exerted on the object.
Why does the speed of an object change with time?
how a karate player can break a pile of tiles with a single blow of his hand
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/s2)
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
why does a scooter tend to skid while executing a sharp turn
When a carpet is beaten with a stick dust comes out. why?
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