400x because you have to multiply that 40 by that 10
Force required = F = ?
mass of the car = m = 1200 kg
initial velocity of the car = Vi = 10 m/sec
final velocity of the car = 0
time required to stop the car = t = 20 sec
Using Newton`s 2nd law of motion;
F = ma ………………………(1)
as a = Vf - Vi / t , put this value in equation (1)
F = m ( Vf - Vi /t ) ………………(2)
F = 1200 ( 0 - 10 /20) = - 600 N
here Negative sign shows that external force is acting in opposite direction of the motion to bring it to rest.
we can also calculate this force by using the relation
Rate of change of momentum = net force acting on the object …………(3)
m Vf - m Vi / t = net force acting on the object
m (Vf - Vi / t) = F
1200 ( 0 - 10 /20) = - 600 N = F
so, net force acting on the object =F = - 600 N
The answer is A. Hope this helps you out.
Cloudy day because of solar radiation
The correct matching of the given items are:
- Omnivore- eats producers and consumers
- Population- all living and non-living things found in an area
- Species- a group of living things, more than one organism.
- Ecosystem- describes a type of organism and what group it belongs to.
<h3>What is an Organism?</h3>
This refers to an individual animal or living thing that is uni-cellular.
Hence, the other answers are:
- Community- a place where an organism lives and produces its own food.
- Limiting factors- anything that can limit the size of a population
- Carnivore- eats herbivores, omnivores and other smaller carnivores
- Food web: a network of food connected chains that shows a feeding relationship
- Symbiosis: a close relationship between species including mutualism, commensalism, parasitism
Read more about ecosystem here:
brainly.com/question/4005996
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