A person hit harder when he falls on a concrete floor than when he falls on a heap of sand from the same height because
on a hard surface he is brought to rest in a very short time
, so greater force comes into action and he is hit harder.
Why is a person likely to get more hurt when he falls on a concrete floor than on the sand?
A man falling on hard concrete road receives more injuries than the one falling on ploughed sand floor. Therefore, man falling on concrete floor is stopped abruptly in a short interval of time and suffers a sudden change in momentum. Therefore, concrete floor exerts a
large force
and man gets more injury.
Why does it hurt more when you fall on a concrete floor than on a floor covered with foam?
When you jump onto the concrete surface, your feet are brought to rest almost instantaneously because
the rate of change of momentum is very high
. Hence, you get injured due to a large force on your body on account of the hard floor.
Why does one get seriously hurt while jumping from the roof to a hard floor but does not get hurt if he jumps on Foam?
Answer: When a man falls on a hard
cemented floor his momentum reduces to zero in a very short time and thus hurts the man
. … Due to longer time, it reduces the man’s momentum gently and hence the man either will not get hurt or may get less injury.
Is it safe to jump on sand rather than a cemented floor why?
Its safe to jump on sand rather than a cement floor
because sand has a smooth surface in which it is safe to jump over but cement is very hard if jumped
on it serious injuries may occur.
What happens to water when it falls on cemented ground?
Answer:
The water does not seep down the cemented floor
because, when the floor is cemented, the surface is made out to be smooth and non-porous, that is why the water remains above the surface and does not sink into the ground through the cement.
Why is it important to follow through and trying to hit a home run?
Why is it important to “follow through” when trying to hit a homerun?
maximizes time that the bat is in contact with the ball.
… increase amount of time it takes the person and therefore decreases force.
Why is a person heartless when he falls on a spongy surface?
a person is less hurt or negligebily hurt because sponge contains air pores which helps us. when we fall on spongy surface the air present in the
surface removed by sponge so that we r less hurt
.
Why is a person hit harder when he falls on a hard floor than when he falls on sand or cotton?
When you fall on sand, it takes some time for you to come to rest as the sand particles move. But when you fall on hard floor, your momentum becomes zero suddenly. So
the change in momentum takes more time in sand than
in hard floor.
Why does one get hurt on jumping from a height?
Since the amount of time taken to get rid of the momentum is the same in both cases, and you have more momentum to get rid of when you jump from a higher height,
more force is required to bring you to rest if you jump
from a higher height. This is the reason why we hurt ourselves when we jump from a higher height.
When a person jumps from significant height there is high chance he may get hurt Why?
Answer: Acceleration due to gravity is produced on a freely falling body. Due to this, when a man jump from a significant height ,
he will have enough time to attain maximum velocity before he reaches the ground
. Therefore, There is more probability of getting hurts when a man jumps from a significant height.
Do you jump higher on grass or concrete?
Simple Answer,
Yes
! If you are comparing jumping off concrete, grass, sand or even dirt then yes jumping off hardwood will more than likely give you the highest jump when compared to the other surfaces. Gymnasium hardwood floors are used and design to absorb the athlete’s impact when running and jumping.
Is it safe to jump on sand or cement floor?
it is
safe to jump on sand rather
then a cement floor because when we jump on cement floor then our momentum directly transfer into floor and this and our momentum is not decrease which can cause a great pain in our leg while when we jump in a sand floor then time increase which cause slowly slowly decrease in momentum …
Why does the person falling on the cemented floor get injured but not the person falling on a heap of sand?
When a person falling on a heap of sand then the person is not injured
because sand is not hard
. There is large space between the particles of sand. Therefore, force acting on the person during fall reduces but in case of cement , cement is hard and solid . … Therefore, force acting on the person during fall is large.
Does wetting concrete make it stronger?
ANSWER: Keeping concrete moist helps the curing process. … If too much water is lost from the concrete through evaporation, the hardening process slows down or ceases.
Concrete continues to gain strength after pouring for as long as it retains moisture
, but the longer it moist-cures, the slower the rate of strength gain.
Does too much water weaken concrete?
One of the most common mix mistakes made by the average concrete worker is adding too much water to concrete. … A watery mix
actively reduces the compressive strength
of the dried concrete. Usually, every additional inch of slump in the concrete reduces the compressive strength of the final product by roughly 500 psi.
