force and pressure question answer of the living world book ch 4
Answers
chlo bhai ab toh khtm hoga gallery ak option an likhna padega...
5.(a)the force responsible for his downwards motion is gravitational force.it is non-contact force.
(b)no the man will come down wid diiferent speed as parachute opposes their motion by air pressure man will come down wid faster speed because he will experience less pressure
6.(a)given,
A=2a
we know that,p=f/a
so,now=p^1=1/2fa
p=p/2
now,the pressure became half initial of pressure...
(b)given,
f=2f
p=f/a
new,p^1=f^1/a
p^1=2^f/a=2p
now,the pressure increases by time...
7. a driver will experience a great force 200 cm below the surface of water pressure increases with depth.....
long.......Q/ans
1. force is a push or pull which an object experienced when interacts with another object no it is not necessary as we know that non-contact is act from distance also for example gravitational force magnetic force
2.the three effects of force are
1. force can change the shape
ex- sprink
2. force can change the direction of moving object
example- if we hit a wall we apply a force and position changes
3.force can change the speed of moving object
example if we sum if someone hit a ball and catch it its speed change
3.(a) because they provide better trips office they can't skip and slides where as normal shoes are more sleepy than the snowy shoes
(b)because it increases the unit area does pressure is also less
(c)it is because sharp knife has pointed surface area so pressure is more in plant knife pressure is small because surface area is less
(d)its surface area is larger the pressure is less so in order to reduce pressure on shoulders the straps of bags are made wide
(e)because Contact areas less between needle and Balloon in compare to finger
(f)at higher altitude the density of air decreases at high altitude RBC number increases in order our body and we suffer from nose bleeding
(e)because you would pass out at cursive altitude if the warrant due to low partition pressure of O2 at high altitude
4. both will equally sink cause their length and weight are same
5.the distance of the water touching the ground from the bottom bottom of can is same for all 3 holes
= range is square root of 4 x h
(4-h)
6.below. Will having the most pressurized flow of water the upper point will be having title less pressure of water flowing
hey mate....
here si your answer....
plz.. mark it as brainlist answer
