. You are standing at the top of a high cliff. You drop a rock and it hits the ground 4seconds later. How fast was it going when it hits the ground?
Answers
Answer:
V = -39.2m/s
Explanation:
Given the following data
Time, t = 4secs
Since the rock is falling, we know that the initial velocity = 0
Acceleration due to gravity = 9.8m/s²
To find the final velocity, we would use the first equation of motion
V = U + at
Substituting into the equation, we have
V = 0 + (-9.8*4)
V = -39.2m/s
Related Questions
The state of matter with a specific volume but no definite shape is the _____ state. plasmagasliquidsolid
a person runs 27.0km west then turns around and runs 13.0km east what's the distance and displacement ?
Which one is having lesser ressistance. a 60w bulb or a 40w bulb?
How is sun related to nuclear, electromagnetic, and heat energy?
Answers
The dependent variable is the speed of plant growth, and the-plant's general health and welfare.
The hypothesis is defective. It should talk about whether the plant is
DEPRIVED of any green light. The way the experiment is described,
the results won't be clear. The "regular" light bulb has a lot of green
wavelengths in it, along with a lot of other stuff that the plant may or
may not be interested in. So the plant's response to the green light
AND the 'regular' light may be very similar.
Answers
Answer:
θ = 19.47°
Explanation:
given,
mass of the barge = 1000 kg
force applied to pull = 80 N
direction = 30° west to north
force exerted by the cable = 120 N
direction = ?
first cable is pulling
in north direction = 80 cos ∅
= 80 cos 30°
= 69.28 N
in west direction = 80 sin ∅
= 80 sin 30°
= 40 N
the other cable will pull in the opposite direction of west
now,
θ = 19.47°
the direction of the cable will be equal to θ = 19.47°
Answers
Answer
Electromagnetic energy
Explanation
Sunlight is a radiation. From the electromagnetic spectrum we have visible light and ultraviolet radiation whose source is the sunlight.
All electromagnetic radiation possess some energy given by E=hf.
Since we have seen that sunlight is in the electromagnet spectrum, it is a form of energy which is electromagnetic.
Final answer:
Sunlight is a form of energy called electromagnetic energy
Explanation:
Sunlight is a form of energy that is emitted by the sun as electromagnetic radiation. This radiation exists in different wavelengths, each with its own characteristic energy. The visible light that we can see is just one type of energy emitted from the sun. It is specifically a subset of electromagnetic radiation that includes visible light, ultraviolet (UV) light, and other wavelengths.
It is produced by nuclear fusion in the sun's core and travels to Earth through space. Sunlight is essential for life on Earth, as it provides energy for photosynthesis in plants, regulates climate, and is a primary source of light and heat for our planet.
Learn more about Sunlight is a form of energy called electromagnetic energy here:
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B) 20 N/m
C) 12 N/m
D) 25 N/m
E) 390 N/m
Answers
Answer: The spring constant is K=392.4N/m
Explanation:
According to hook's law the applied force F will be directly proportional to the extension e produced provided the spring is not distorted
The force F=ke
Where k=spring constant
e= Extention produced
h=2m
Given that
e=20cm to meter 20/100= 0.2m
m=100g to kg m=100/1000= 0.1kg
But F=mg
Ignoring air resistance
assuming g=9.81m/s²
Since the compression causes the plastic ball to poses potential energy hence energy stored in the spring
E=1/2ke²=mgh
Substituting our values to find k
First we make k subject of formula
k=2mgh/e²
k=2*0.1*9.81*2/0.1²
K=3.921/0.01
K=392.4N/m
voltage applied to
a circuit and the
current in a circuit?
Answers
Answer:
The relationship between voltage and current is called resistance. The relationship between all 3 is called Ohm's Law.
General Formulas and Concepts:
Circuits
Ohm's Law: V = IR
- V is voltage/EMF
- I is current
- R is resistance
Explanation:
Ohm's Law is the fundamental basic for an ohmic surface. All circuits follow Ohm's Law if it is ohmic and assuming all other things constant. It tells the importance of the relationship between voltage, current, and resistance in a given current of a battery, wire, and resistor.
It is wise that you memorize this and understand the relationship between all 3.
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Learn more about EMAG: brainly.com/question/27293828
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Topic: AP Physics C - Electricity and Magnetism
Unit: Circuits
Answers
Answer:
0.6 seconds
Explanation:
The time to fall from height h is ...
t = √(2h/g)
t = √(2(1.86 m)/(9.8 m/s^2)) ≈ √0.3796 s ≈ 0.616 s
It would take about 0.6 seconds for the projectile to hit the ground.
Answer:
0.6seconds
isuranswer:)
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