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kirza4 [7]
3 years ago
13

Anybody????! Help me please ‍♀️

Physics
1 answer:
stepladder [879]3 years ago
5 0
The answer to this is B
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A stone is thrown horizontally at 30m/s from a tall cliff.
Jobisdone [24]

x(2) = 30(2) = 60 m

y(2) = ½(-9.8)2² = -19.6 m

x(4) = 30(4) = 120 m

y(4) = ½(-9.8)4² = -78.4 m

x(6) = 30(6) = 180 m

y(6) = ½(-9.8)6² = -176.4 m

x(8) = 30(8) = 240 m

y(8) = ½(-9.8)8² = -313.6 m

x(10) = 30(10) = 300 m

y(10) = ½(-9.8)10² = -490 m

5 0
3 years ago
A 50 kg aardvark runs with a speed of 6 m/s. what is the kinetic energy of the aardvark
jeyben [28]

Answer:

900 J

Explanation:

0.5 x 50= 25 x 6^2= 900 J

5 0
4 years ago
Driving 30.7 m/s in your car you see a dog up ahead and slam on your brakes. You stop just before hitting the dog after skidding
Nitella [24]

Answer: 2.74

Explanation:

We can solve this problem using the stopping distance formula:

d=\frac{(V_{o})^{2}}{2 \mu g}

Where:

d=132.1 m is the distance traveled by the car before it stops

V_{o}=30.7 m/s is the car's initial velocity

\mu is the coefficient of friction between the road and the tires

g=9.8 m/s^{2} is the acceleration due gravity

Isolating \mu:

\mu=\frac{2dg}{(V_{o})^{2}}

Solving:

\mu=\frac{2(132.1 m)(9.8 m/s^{2})}{(30.7 m/s)^{2}}

\mu=2.74 This is the coefficient of friction

7 0
3 years ago
Earth orbits the sun once every
Karo-lina-s [1.5K]

Answer:1 trip around the earth is an angular displacement of 2*pi

3.6525*10^2 days

I

Explanation:24 h/1 day * 3.600*10^3 s/1h = 3.156*10^7 s

Angular speed = angular displacement / time

Angular speed = 2*pi rads / 3.156*10^7 s = 1.9910*10^-7 rad/s

3 0
3 years ago
explain how fossil records of the past are reliable sources of information about evolution of life on Earth.
Tema [17]
Because the fossil show layers and those layers show what kind of settlements where left behind at that layer
4 0
4 years ago
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