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I will assume that you want to know if the driver can stop before hitting the obstacle or not.
First step is to use the reaction time in order to know how far can she go before her motion starts to slow:
distance = velocity x time = 20 x 0.5 = 10 m
Thus, the driver has 50 - 10 = 40 m to stop before colliding
Second step is to calculate the distance that the driver requires to stop using the rules of velocity and distance:
1- velocity = acceleration x time
20 = 6t ..............> thus, time = 3.334 seconds
2- distance = 0.5 x a x t^2 = 0.5 x 6 x (3.334)^2 = 33.3466 m
From the previous calculations, we can see that the driver has 40 m to stop and she needs only 33.3466 m to stop based on the given parameters. This means that she can stop before collision.
A: Renewable resources make cleaner energy.
D: It often costs more to produce energy from renewable resources.
E: More local suppliers can provide energy from renewable resources to customers
Explanation:
Renewable sources of energy are cleaner and more accessible source of energy. They are easily replenished.
With current usage metrics, they can satisfactorily meet the energy demand of the world without affecting their supply.
- Renewable energy include biomass, wind energy, wave energy, solar energy e.t.c
- These energy sources are easily replenished.
- To produce energy from renewable sources, it usually costs more.
- Most equipment and devices that produces energy from renewable sources are highly pricey.
- Renewable energy is the future of energy production.
- Most smart cities around the world have solely relied on harnessing this source of energy.
- They no carbon emission to the environment and would not lead to climate change.
learn more:
Non - renewable source of energy brainly.com/question/3386515
#learnwithBrainly
#3). c
#4). b
#5). d
Does it mean as much as you thought it would ?
Answer:
hello the answer is 47m/s