What allows us to stand upright and keeps us from falling through the ground?
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A 600 kg car is at test and then accelerated to 5m/s , what is its original kinetic energy
Organisms produce their own energy or provide energy for other organisms in a food chain. Many different organisms can be found in the Amazon rainforest in South America. Organisms in this biome include a variety of trees, plants, insects, fish, birds, reptiles, and mammals. The jaguar and anaconda are among the largest predators found in the Amazon.
A myth that explains the spots on the moon is called
A strand of 10 lights is plugged into an outlet. How can you determine if the lights are connected in series or parallel?A) Unscrew one light. If the other lights stay on, it's a series circuit. B) Unplug the strand. If the first light stays on, it's a series circuit. C) Unscrew one light. If the other lights turn off, it's a series circuit. D) Cut the strand in half. If the plugged in half stays on, it's a series circuit.
B. Wave A has the higher frequency. It's frequency is 25 Hz
C. Wave B has the higher frequency. It's frequency is 42 Hz
D. Wave B has the higher frequency. It's frequency is 7 Hz
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Answer:
B
Explanation:
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Answer:
480 mph
Explanation:
speed = 60 mph
time = 8 hours
distance = speed*time
= 60*8
= 480 mph
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Answer:
x = v₀ cos θ t, y = y₀ + v₀ sin θ t - ½ g t2
Explanation:
This is a projectile launch exercise, in this case we will write the equations for the x and y axes
Let's use trigonometry to find the components of the initial velocity
sin θ = / v₀
cos θ = v₀ₓ / v₀
v_{y} = v_{oy} sin θ
v₀ₓ = vo cos θ
now let's write the equations of motion
X axis
x = v₀ₓ t
x = v₀ cos θ t
vₓ = v₀ cos θ
Y axis
y = y₀ + t - ½ g t2
y = y₀ + v₀ sin θ t - ½ g t2
v_{y} = v₀ - g t
v_{y} = v₀ sin θ - gt
= v_{oy}^2 sin² θ - 2 g y
As we can see the fundamental change is that between the horizontal launch and the inclined launch, the velocity has components
Final answer:
If a projectile is thrown at an angle above the horizontal, this introduces an additional vertical velocity component. This would affect the equations of Parts C and E by changing the values substituted into them, thereby altering the results for time of flight, highest point, and distance traveled.
Explanation:
If the projectile is thrown from a cliff at an angle above the horizontal, it would introduce a vertical component to the initial velocity in the equations. The equations of motion in Parts C and E would therefore need to incorporate this changed initial velocity.
In the equations, the initial vertical velocity is usually denoted by Vi*sin(θ), where θ is the angle at which the projectile is launched. Similarly, the horizontal velocity is expressed as Vi*cos(θ).
This additional vertical component would affect the time of flight, the height reached by the projectile, and the horizontal distance traveled before it hits the ground. Thus, while the form of the equations might not change, the values substituted into them would.
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From your equation, we can tell that you're defining the upward direction as
positive. We can also tell that you threw the stone upward, with an initial speed
as it left your hand of 128 feet per second, about 87 miles per hour ... a mighty toss indeed, and I think there's a man from the Chicago Cubs waiting outside
who'd like to talk to you.
Anyway, When the stone splashes into the water, h(t) = 0 .
-16t² + 128t + 32 = 0
Divide each side by -16 :
t² - 8t - 2 = 0
I don't see any easy way to factor the expression on the left,
so I have to use the quadratic formula to solve this equation.
t = 4 plus and minus √18 .
t = +8.24 seconds
t = -0.24 second
Mathematically, both numbers are valid solutions.But when you apply
the equation to a real world situation, only the positive 't' makes sense.
So t = 8.24 seconds.
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Answer:
The initial velocity of the skater is 13.22 m/s.
Explanation:
Given that,
Acceleration of the skater,
Distance covered, d = 50 m
The skater's final velocity was, v = 20 m/s
We need to find the initial velocity of the skater. It can be calculated using third equation of motion as :
So, the initial velocity of the skater is 13.22 m/s. Hence, this is the required solution.
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Kinematics
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Answer:
Vi = Vf - (a * t) just plug this in.
Vi stands for “initial velocity”
Vf stands for “final velocity”
a stands for “acceleration”
t stands for “time”