What evidence do you have that the planets move in elliptical orbits around the sun and not in circular orbits
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Definition1/13
Elliptical orbits of the planets around the sun actually match
what we observe. Newton's Theory of Universal Gravitation states
that planets will move around the sun in elliptical orbits.
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Term1/13
A ball is thrown horizontally at 20 ms from the top of a cliff 50 meters high How long does it take the ball to reach the ground
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Definition1/13
Use the equation [ D = 1/2 g t2 ] .
D = the distance of free-fall = 50 m
g = acceleration of gravity = 9.8 m/sec2
t = time in free-fall
D = 1/2 g t2
2D / g = t2
t = sqrt( 2D / g ) = sqrt( 100 / 9.8 ) = 3.1944 seconds(rounded)
The horizontal velocity that the ball has when it's launched doesn't appear
in the calculation, because it makes absolutely no difference in the result.
Any effects of air resistance have been ignored in arriving at this solution.
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Term1/13
The value of the impulse equals the force x the
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Definition1/13
The value of the impulse equals the the force times the time.
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Term1/13
A ball is thrown horizontally from a cliff and hits the ground 4 seconds later 40 meters from the base of the cliff how high was the cliff rounded to the nearest tenth of a meter
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Definition1/13
Ignoring air resistance:
The distance from the base of the cliff is irrelevant as the only force acting on the ball is gravity acting straight down, giving it acceleration due to gravity.
s = ut + 1/2 at^2
For this problem: u = 0 m/s, t = 4 s, a = g (= acceleration due to gravity)
No value is given for g, but as an answer to the nearest tenth is required (1 dp), I'll use a value for g to 2 dp so that I can then round the answer to 1 dp: I'll use g ≈ 9.81 m/s^2
→ s ≈ 0 m + 1/2 x 9.81 m/s^2 x (4 s)^2 = 78.48 m
Rounded to the nearest tenth → 78.5 m.
horizontal distance = speed x time s = vt
45 = 15 t
t = 3 seconds
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Term1/13
Two forces act on the same object One force is pushing due east with a force of 6 newtons and the other is pushing due north at 8 newtons What is the resulting force
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Definition1/13
10 newtons NE. a little more north than east
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Term1/13
What is the vertical component influenced by
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Definition1/13
Gravity
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Term1/13
A ball is thrown horizontally from a cliff at a speed of 15 ms and strikes the ground 45 meters from the base of the cliff How high was the cliff rounded to the nearest meter
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Definition1/13
Answer: 44 meters
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Term1/13
A plane is flying north at a speed of 200 miles per hour The wind is blowing at a constant speed of 40 miles per hour from the east What is the resulting speed of the plane calculated to the nearest
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Definition1/13
204 mph
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Term1/13
What force is needed to give a 2000 kg car an acceleration of 1.5 ms³
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Definition1/13
3,000
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Term1/13
A football is thrown horizontally off the top of an apartment house that is 78.4 meters high the ball is thrown at a speed of 15 ms how far will the ball travel before hitting the streets below
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Definition1/13
"60" or "sixty"
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Term1/13
A player kicks a soccer ball from ground level and sends it flying at an angle of 30 degrees at a speed of 26 ms
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Definition1/13
Yes your question is.......................
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Term1/13
What term is given to the net figure that results from vector
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Definition1/13
resultant
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Term1/13
What type of measurement is thisthe distance from point A to point B on a grid
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Definition1/13
Length.
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Cards in this guide (13)
What evidence do you have that the planets move in elliptical orbits around the sun and not in circular orbits
Elliptical orbits of the planets around the sun actually match
what we observe. Newton's Theory of Universal Gravitation states
that planets will move around the sun in elliptical orbits.
A ball is thrown horizontally at 20 ms from the top of a cliff 50 meters high How long does it take the ball to reach the ground
Use the equation [ D = 1/2 g t2 ] .
D = the distance of free-fall = 50 m
g = acceleration of gravity = 9.8 m/sec2
t = time in free-fall
D = 1/2 g t2
2D / g = t2
t = sqrt( 2D / g ) = sqrt( 100 / 9.8 ) = 3.1944 seconds(rounded)
The horizontal velocity that the ball has when it's launched doesn't appear
in the calculation, because it makes absolutely no difference in the result.
Any effects of air resistance have been ignored in arriving at this solution.
The value of the impulse equals the force x the
The value of the impulse equals the the force times the time.
A ball is thrown horizontally from a cliff and hits the ground 4 seconds later 40 meters from the base of the cliff how high was the cliff rounded to the nearest tenth of a meter
Ignoring air resistance:
The distance from the base of the cliff is irrelevant as the only force acting on the ball is gravity acting straight down, giving it acceleration due to gravity.
s = ut + 1/2 at^2
For this problem: u = 0 m/s, t = 4 s, a = g (= acceleration due to gravity)
No value is given for g, but as an answer to the nearest tenth is required (1 dp), I'll use a value for g to 2 dp so that I can then round the answer to 1 dp: I'll use g ≈ 9.81 m/s^2
→ s ≈ 0 m + 1/2 x 9.81 m/s^2 x (4 s)^2 = 78.48 m
Rounded to the nearest tenth → 78.5 m.
horizontal distance = speed x time s = vt
45 = 15 t
t = 3 seconds
Two forces act on the same object One force is pushing due east with a force of 6 newtons and the other is pushing due north at 8 newtons What is the resulting force
10 newtons NE. a little more north than east
What is the vertical component influenced by
Gravity
A ball is thrown horizontally from a cliff at a speed of 15 ms and strikes the ground 45 meters from the base of the cliff How high was the cliff rounded to the nearest meter
Answer: 44 meters
A plane is flying north at a speed of 200 miles per hour The wind is blowing at a constant speed of 40 miles per hour from the east What is the resulting speed of the plane calculated to the nearest
204 mph
What force is needed to give a 2000 kg car an acceleration of 1.5 ms³
3,000
A football is thrown horizontally off the top of an apartment house that is 78.4 meters high the ball is thrown at a speed of 15 ms how far will the ball travel before hitting the streets below
"60" or "sixty"
A player kicks a soccer ball from ground level and sends it flying at an angle of 30 degrees at a speed of 26 ms
Yes your question is.......................
What term is given to the net figure that results from vector
resultant
What type of measurement is thisthe distance from point A to point B on a grid
A ball is thrown horizontally at 20 ms from the top of a cliff 50 meters high How long does it take the ball to reach the ground
What type of measurement A northwesterly wind of 5 miles per hour
Two forces act on the same object One force is pushing due east with a force of 6 newtons and the other is pushing due north at 8 newtons What is the resulting force
A ball is thrown horizontally from a cliff at a speed of 15 ms and strikes the ground 45 meters from the base of the cliff How long was the ball in the air
A ball is thrown horizontally at 20 ms from the top of a cliff 50 meters high How long does it take the ball to reach the ground
The value of the impulse equals the force x the
What type of measurement A northwesterly wind of 5 miles per hour
Two forces act on the same object One force is pushing due east with a force of 6 newtons and the other is pushing due north at 8 newtons What is the resulting force
A ball is thrown horizontally at 20 ms from the top of a cliff 50 meters high How long does it take the ball to reach the ground
The value of the impulse equals the force x the
What type of measurement A northwesterly wind of 5 miles per hour
Two forces act on the same object One force is pushing due east with a force of 6 newtons and the other is pushing due north at 8 newtons What is the resulting force
A ball is thrown horizontally at 20 ms from the top of a cliff 50 meters high How long does it take the ball to reach the ground
A ball is thrown horizontally from a cliff and hits the ground 4 seconds later 40 meters from the base of the cliff how high was the cliff rounded to the nearest tenth of a meter
What type of measurement A northwesterly wind of 5 miles per hour
Two forces act on the same object One force is pushing due east with a force of 6 newtons and the other is pushing due north at 8 newtons What is the resulting force