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give 7 examples of inertia of rest with explanation
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
what is the formula of recoil velocity of a gun?????????
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
explain why a cricketer moves his hands backwards while catching a fast moving cricket ball.
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
Define force and write its si. Unit
1 .A car of mass 1000kg and a bus of mass 8000kg are moving with the same velocity of 36
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
examples of newton's second law of motion
why are road accidents at high speed are very much worse than accidents at low speed???
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 _____________
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
DO THE UNBALANCED FORCE CAN ALSO CHANGE THE SHAPE OF THE OBJECT ?? IF YES THEN GIVE ONE EXAMPLE !!
how does a karate player breaks a slab of ice with a single blow?
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
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?
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).
suggest a situation in which object is accelerated and have constant speed
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 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.....
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.
If the engine of a car provides an acceleration of 2m/s^2 to start it from rest, assuming the mass to be roughly 1000kg,calculate time after which car the comes to rest , if the engine is turned off after 15 seconds.(Frictional Force = 15N)
A bullet fired from a gun makes a clean whole in a window whereas a stone pebble thrown brakes the whole window.why?
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 ..
Q- two carts A and B of mass 10 kg each are placed on a horizontal track. They are joined tightly by a light but strong rope C . a man holds the cart A and pulls it towards the right with a force of 70N. The total force of friction by the track and the air on each cart is 15N,acting toward the left. Find:-
(a) the acceleration of the cart
(b) the force exerted by the rope on the car B
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??
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
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?
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 40 kg skater moving at 4ms eastwards collides head on with a 60 kg skater travelling at 3ms westwards . if the two skates remain in contact, what is their final velocity?
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.
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)
When a carpet is beaten with a stick dust comes out. why?
Give two examples each when-1) Force changes the speed of a moving body2) Force stops a moving body3) Force changes the direction of motion of a body4) Forces changes the shape and size of a body
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